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Cover Page	12 Months Ended
Cover Page	Dec. 31, 2019 shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	Aurora Mobile Ltd
Entity Central Index Key	0001737339
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	E9
Entity Address, Address Line One	3/F, Building No. 7, Zhiheng Industrial Park
Entity Address, Address Line Two	No. 15, Guankou Road 2, Anle Community, Nantou Street
Entity Address, City or Town	Nanshan District
Entity Address, Postal Zip Code	518052
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Document Registration Statement	false
Document Accounting Standard	U.S. GAAP
Entity File Number	001-38587
Entity Address, Country	CN
Business Contact [Member]
Document Information [Line Items]
Entity Address, Address Line One	3/F, Building No. 7, Zhiheng Industrial Park
Entity Address, Address Line Two	No. 15, Guankou Road 2, Anle Community, Nantou Street
Entity Address, City or Town	Nanshan District
Entity Address, Postal Zip Code	518052
Contact Personnel Name	Shan-Nen Bong
American Depositary Shares
Document Information [Line Items]
Trading Symbol	JG
Security Exchange Name	NASDAQ
Title of 12(b) Security	American depositary shares, every three of which represent two Class A common shares
Class A Common Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	60,106,037
Title of 12(b) Security	Class A common shares, par value US$0.0001 per share
No Trading Symbol Flag	true
Class B Common Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	17,000,189

CONSOLIDATED BALANCE SHEETS ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Current assets:
Cash and cash equivalents	$ 61,975	¥ 431,459	¥ 576,562
Restricted cash	17	115	115
Accounts receivable, net of allowances of RMB9,308 and RMB28,516 (US$4,096) as of December 31, 2018 and 2019, respectively	19,452	135,417	141,911
Prepayments and other current assets	12,366	86,087	80,578
Amounts due from related parties	75	521	4,564
Total current assets	93,885	653,599	803,730
Non-current assets:
Property and equipment, net	15,260	106,235	92,874
Intangible assets, net	1,265	8,810	1,531
Long-term investments	24,223	168,637	79,696
Other non-current assets	378	2,642	14,237
Total non-current assets	41,126	286,324	188,338
Total assets	135,011	939,923	992,068
Current liabilities:
Accounts payable (including accounts payable of the variable interest entity ("VIE") without recourse to the Company of RMB18,683 and RMB19,974 (US$2,869) as of December 31, 2018 and 2019, respectively)	2,872	19,996	18,811
Deferred revenue and customer deposits (including deferred revenue and customer deposits of the VIE without recourse to the Company of RMB55,625 and RMB73,820 (US$10,604) as of December 31, 2018 and 2019, respectively)	11,141	77,561	59,483
Accrued liabilities and other current liabilities (including accrued liabilities and other current liabilities of the VIE without recourse to the Company of RMB59,556 and RMB72,580 (US$10,425) as of December 31, 2018 and 2019, respectively)	13,829	96,277	76,666
Amounts due to related parties (including amount due to related parties of the VIE without recourse to the Company of RMB8,864 and RMB56 (USD$8) as of December 31, 2018 and 2019, respectively)	8	56	8,864
Total current liabilities	27,850	193,890	163,824
Non-current liabilities:
Other non-current liabilities (including other non-current liabilities of the VIE without recourse to the Company of RMB140 and RMB64 (US$9) as of December 31, 2018 and 2019, respectively)	9	64	140
Deferred revenue	1,171	8,150	10,265
Convertible notes	33,042	230,031	216,179
Total non-current liabilities	34,222	238,245	226,584
Total liabilities	62,072	432,135	390,408
Commitments and contingencies
Shareholders' equity
Treasury shares (46,303 and 81,930 class A common shares as of December 31, 2018 and 2019, respectively)	(287)	(1,999)	(3,165)
Additional paid-in capital	137,426	956,735	944,500
Accumulated deficit	(65,121)	(453,359)	(348,123)
Accumulated other comprehensive income	914	6,363	8,400
Total shareholders' equity	72,939	507,788	601,660
Total liabilities and shareholders' equity	135,011	939,923	992,068
Class A Common Shares
Shareholders' equity
Common shares	5	37	37
Class B Common Shares
Shareholders' equity
Common shares	$ 2	¥ 11	¥ 11

CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 CNY (¥) shares	Dec. 31, 2018 CNY (¥) shares	Jun. 27, 2018 shares	Dec. 31, 2017 shares
Accounts receivable, net of allowances	$ 4,096	¥ 28,516	¥ 9,308
Accounts payable	2,872	19,996	18,811
Deferred revenue and customer deposits	5,694	39,638	33,067
Accrued liabilities and other current liabilities	13,829	96,277	76,666
Amount due to related parties	8	56	8,864
Other non-current liabilities	$ 9	¥ 64	¥ 140
Common shares, shares authorized				5,000,000,000
Common shares, shares outstanding					42,666,670
Class A Common Shares
Common shares, par value per share \| $ / shares	$ 0.0001
Common shares, shares authorized	4,920,000,000	4,920,000,000	4,920,000,000
Common shares, shares issued	60,106,037	60,106,037	59,547,823
Common shares, shares outstanding	60,106,037	60,106,037	59,547,823
Treasury stock	81,930	81,930	46,303
Class B Common Shares
Common shares, par value per share \| $ / shares	$ 0.0001
Common shares, shares authorized	30,000,000	30,000,000	30,000,000
Common shares, shares issued	17,000,189	17,000,189	17,000,189
Common shares, shares outstanding	17,000,189	17,000,189	17,000,189
VIE
Accounts payable	$ 2,869	¥ 19,974	¥ 18,683
Deferred revenue and customer deposits	10,604	73,820	55,625
Accrued liabilities and other current liabilities	10,425	72,580	59,556
Amount due to related parties	8	56	8,864
Other non-current liabilities	$ 9	¥ 64	¥ 140

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares	Dec. 31, 2018 CNY (¥) ¥ / shares shares	Dec. 31, 2017 CNY (¥) ¥ / shares shares
Revenues (including related party amounts of RMB3,507, RMB2,544 and RMB266 (US$38) for the years ended December 31, 2017, 2018 and 2019, respectively)	$ 130,205	¥ 906,458	¥ 714,141	¥ 284,709
Cost of revenues (including related party amounts of RMB788, RMB20,947 and RMB11,600 (US$1,666) for the years ended December 31, 2017, 2018 and 2019, respectively)	(93,309)	(649,596)	(517,074)	(213,370)
Gross profit	36,896	256,862	197,067	71,339
Operating expenses
Research and development (including related party amounts of RMB762, RMB200 and nil for the years ended December 31, 2017, 2018 and 2019, respectively)	(25,316)	(176,248)	(134,358)	(71,651)
Sales and marketing (including related party amounts of RMB541, RMB178 and nil for the years ended December 31, 2017, 2018 and 2019, respectively)	(17,028)	(118,548)	(83,853)	(59,673)
General and administrative (including related party amounts of RMB138, RMB59 and nil for the years ended December 31, 2017, 2018 and 2019, respectively)	(15,699)	(109,291)	(71,641)	(32,431)
Total operating expenses	(58,043)	(404,087)	(289,852)	(163,755)
Loss from operations	(21,147)	(147,225)	(92,785)	(92,416)
Foreign exchange (loss)/ gain, net	62	435	264	(2,724)
Interest income	905	6,300	3,657	314
Interest expense	(1,597)	(11,118)	(7,054)	(122)
Other income	5,576	38,812	8,449	677
Change in fair value of derivative asset	448	3,117
Change in fair value of derivative liability			21,302
Loss before income taxes	(15,753)	(109,679)	(66,167)	(94,271)
Income tax benefit (expense)	(23)	(162)	(30)	3,980
Net loss	(15,776)	(109,841)	(66,197)	(90,291)
Net loss attributable to Aurora Mobile Limited's shareholders	(15,776)	(109,841)	(66,197)	(90,291)
Accretion of contingently redeemable convertible preferred shares			(24,094)	(26,391)
Net loss attributable to common shareholders	(15,776)	(109,841)	(90,291)	¥ (116,682)
Net loss per share for class A and class B common shares:
Common shares - basic and diluted \| ¥ / shares				¥ (2.73)
Shares used in net loss per share computation:
Common shares - basic and diluted \| shares				42,666,670
Other comprehensive income (loss)
Foreign currency translation adjustments	(293)	(2,037)	11,688	¥ (7,563)
Total other comprehensive income (loss), net of tax	(293)	(2,037)	11,688	(7,563)
Total comprehensive loss	(16,069)	(111,878)	(54,509)	(97,854)
Comprehensive loss attributable to Aurora Mobile Limited	(16,069)	(111,878)	(54,509)	¥ (97,854)
Class A Common Shares
Operating expenses
Net loss attributable to Aurora Mobile Limited's shareholders	(12,282)	(85,502)	(46,606)
Accretion of contingently redeemable convertible preferred shares			(16,963)
Net loss attributable to common shareholders	$ (12,282)	¥ (85,502)	¥ (63,569)
Net loss per share for class A and class B common shares:
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)
Shares used in net loss per share computation:
Common shares - basic and diluted \| shares	59,721,341	59,721,341	40,441,999
Class B Common Shares
Operating expenses
Net loss attributable to Aurora Mobile Limited's shareholders	$ (3,496)	¥ (24,339)	¥ (19,591)
Accretion of contingently redeemable convertible preferred shares			(7,131)
Net loss attributable to common shareholders	$ (3,496)	¥ (24,339)	¥ (26,722)
Net loss per share for class A and class B common shares:
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)
Shares used in net loss per share computation:
Common shares - basic and diluted \| shares	17,000,189	17,000,189	17,000,189

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Statement of Comprehensive Income [Abstract]
Revenues - related parties	$ 38	¥ 266	¥ 2,544	¥ 3,507
Cost of revenues - related party	$ 1,666	11,600	20,947	788
Research and development - related party		0	200	762
Sales and Marketing - related party		0	178	541
General and administrative - related party		¥ 0	¥ 59	¥ 138

- Definition

Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

+ References + Details

- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References + Details

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT ¥ in Thousands, $ in Thousands	USD ($) shares	CNY (¥) shares	Common Stock USD ($) shares	Common Stock CNY (¥) shares	Treasury Stock USD ($)	Treasury Stock CNY (¥)	Additional Paid-in Capital USD ($)	Additional Paid-in Capital CNY (¥)	Accumulated Other Comprehensive Income USD ($)	Accumulated Other Comprehensive Income CNY (¥)	Accumulated Deficit USD ($)	Accumulated Deficit CNY (¥)
Balance at Dec. 31, 2016		¥ (108,414)		¥ 26				¥ 5,414		¥ 4,274		¥ (118,128)
Balance, Shares at Dec. 31, 2016 \| shares			42,666,670	42,666,670
Net loss		(90,291)										(90,291)
Translation adjustments		(7,563)								(7,563)
Accretion of contingently redeemable convertible preferred shares		(26,391)										(26,391)
Share-based compensation		8,275						8,275
Balance at Dec. 31, 2017		(224,384)		¥ 26				13,689		(3,289)		(234,810)
Balance, Shares at Dec. 31, 2017 \| shares			42,666,670	42,666,670
Net loss		(66,197)										(66,197)
Translation adjustments		11,688								11,689
Issuance of Class A common shares in connection with initial public offering		464,380		¥ 4				464,376
Issuance of Class A common shares in connection with initial public offering, Shares \| shares			6,059,708	6,059,708
Conversion of all outstanding contingently redeemable convertible preferred shares to Class A common shares		401,691		¥ 18				357,222				44,451
Conversion of all outstanding contingently redeemable convertible preferred shares to Class A common shares, Shares \| shares			27,867,937	27,867,937
Redemption of contingently redeemable convertible preferred shares		(6,915)										(6,915)
Accretion of contingently redeemable convertible preferred shares								84,652				(84,652)
Repurchased shares		(3,165)				¥ (3,165)
Repurchased shares, Shares \| shares			(46,303)	(46,303)
Share-based compensation		24,561						24,561
Balance at Dec. 31, 2018		601,660		¥ 48		(3,165)		944,500		8,400		(348,123)
Balance, Shares at Dec. 31, 2018 \| shares			76,548,012	76,548,012
Net loss	$ (15,776)	(109,841)										(109,841)
Cumulative effect of adoption of ASC 606 (Note 2)		4,605										4,605
Translation adjustments	$ (293)	(2,037)								(2,037)
Exercise and vesting of share-based awards		¥ 3,676				38,725		(35,049)
Exercise and vesting of share-based awards , shares \| shares	1,113,098	1,113,098	1,125,648	1,125,648
Conversion of all outstanding contingently redeemable convertible preferred shares to Class A common shares		¥ (2,037)
Repurchased shares		(37,559)				(37,559)
Repurchased shares, Shares \| shares			(567,434)	(567,434)
Share-based compensation		47,284						47,284
Balance at Dec. 31, 2019	$ 72,939	¥ 507,788	$ 7	¥ 48	$ (287)	¥ (1,999)	$ 137,426	¥ 956,735	$ 914	¥ 6,363	$ (65,121)	¥ (453,359)
Balance, Shares at Dec. 31, 2019 \| shares			77,106,226	77,106,226

CONSOLIDATED STATEMENTS OF CASH FLOWS ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Cash flows from operating activities:
Net loss	$ (15,776)	¥ (109,841)	¥ (66,197)	¥ (90,291)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property and equipment	4,318	30,059	18,084	8,805
Amortization of intangible assets	331	2,307	307	35
Unrealized exchange (gain) loss	(249)	(1,731)	11,689	339
Allowance for doubtful accounts	2,881	20,054	5,846	2,427
Interest expenses	1,163	8,094
Deferred tax benefit			(5)	(3,980)
Loss on disposal of property and equipment	2	15
Gain on an equity investment sold	(974)	(6,778)
Unrealized gain on equity investments held	(2,485)	(17,298)
Gain on fair value change from derivative assets	(448)	(3,117)
Share-based compensation expenses	6,792	47,284	24,561	8,275
Changes in operating assets and liabilities,
Accounts receivable	(3,655)	(25,443)	(98,163)	(48,266)
Prepayments and other current assets	165	1,149	(46,350)	(21,558)
Amounts due from related parties	581	4,043	(3,303)	(1,169)
Other non-current assets	101	702	(1,431)	(492)
Accounts payable	175	1,220	10,471	13,015
Deferred revenue and customer deposits	2,733	19,027	19,861	31,144
Tax payable	23	162
Accrued liabilities and other current liabilities	1,899	13,219	24,027	26,503
Amounts due to related parties	(1,265)	(8,809)	2,754	(243)
Change in deferred tax liabilities			(5)
Other non-current liabilities	(11)	(76)	(76)	(76)
Net cash used in operating activities	(3,699)	(25,758)	(97,925)	(75,532)
Cash flows from investing activities:
Proceeds from maturity of time deposits				10,053
Purchase of structured deposits	(142,923)	(995,000)
Proceeds from maturity of structured deposits	143,670	1,000,201
Increase in long-term prepayments	0	0	(11,000)
Purchase of long-term investments	(6,792)	(47,286)	(68,716)	(10,000)
Proceeds from an equity investment sold	1,436	10,000
Investment in a convertible loan	(1,149)	(8,000)
Purchase of property and equipment	(5,673)	(39,494)	(57,934)	(28,378)
Proceeds from disposal of property and equipment	29	199
Purchase of intangible assets	(1,377)	(9,586)	(1,556)	(319)
Net cash used in investing activities	(12,779)	(88,966)	(139,206)	(28,644)
Cash flows from financing activities:
Proceeds from issuance of contingently redeemable convertible preferred shares, net of issuance cost				217,446
Proceeds from issuance of convertible notes, net of issuance cost			216,179
Proceeds from initial public offering, net of issuance cost			464,380
Redemption of contingently redeemable convertible preferred shares			(62,510)
Repurchase of ordinary shares	(5,395)	(37,559)	(3,165)
Proceeds from exercise of share options	528	3,676
Net cash provided by/ (used in) financing activities	(4,867)	(33,883)	614,884	217,446
Effect of exchange rate on cash and cash equivalents and restricted cash	502	3,504	(9,352)	(8,282)
Net increase/ (decrease) in cash and cash equivalents and restricted cash	(20,843)	(145,103)	368,401	104,988
Cash, cash equivalents and restricted cash at the beginning of year	82,835	576,677	208,276	103,288
Cash and cash equivalents at the beginning of the year	82,818	576,562	208,161	103,168
Restricted cash at the beginning of the year	17	115	115	120
Cash, cash equivalents and restricted cash at the end of year	61,992	431,574	576,677	208,276
Cash and cash equivalents at the end of the year	61,975	431,459	576,562	208,161
Restricted cash at the end of the year	17	115	115	115
Supplemental disclosures of cash flow information:
Interest expense paid				122
Non-cash investing and financing activities:
Acquisition of long-term investments	3,937	27,410
Purchase of property and equipment included in accrued liabilities and other current liabilities	$ 595	¥ 4,140	¥ 104	¥ 9,731

Organization and Principal Activities

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Principal Activities

1	Organization and principal activities

Aurora Mobile Limited (the “Company” and where appropriate, the term “Company” also refers to its subsidiaries and variable interest entity) is a limited company incorporated in the Cayman Islands under the laws of the Cayman Islands on April 9, 2014. The Company, through its subsidiaries and variable interest entity (“VIE”), are principally engaged in providing targeted marketing and SaaS products service, which include developer services, financial risk management, market intelligence and location-based intelligence services, in the People’s Republic of China (the “PRC”).

As PRC laws and regulations prohibit and restrict foreign ownership of internet value-added businesses, the Company operates its business, primarily through the VIE. The Company, through JPush Information Consulting (Shenzhen) Co., Ltd. (“Shenzhen JPush” or “WFOE”) entered into powers of attorney and an exclusive option agreement with the nominee shareholders of the VIE, Shenzhen Hexun Huagu Information Technology Co., Ltd., that gave WFOE the power to direct the activities that most significantly affect the economic performance of the VIE and to acquire the equity interests in the VIE when permitted by the PRC laws, respectively. In addition, pursuant to the supplementary agreements signed in March, 2018, the rights under the aforementioned power of attorney and the exclusive call option agreements were assigned to the board of directors of the Company (the “Board”) or any officer authorized by the Board, which entitled the Company to receive economic benefits from the VIE that potentially could be significant to the VIE.

Despite the lack of technical majority ownership, the Company has effective control of the VIE through a series of VIE agreements and a parent-subsidiary relationship exists between the Company and the VIE. Through the VIE agreements and the supplementary agreements, the shareholders of the VIE effectively assigned all of their voting rights underlying their equity in the VIE to the Company. In addition, through the exclusive business operation agreement, the Company, through its WFOE in the PRC, have the right to receive economic benefits from the VIE that potentially could be significant to the VIE. Lastly, through the financial support agreement and the shareholder voting proxy agreement, the Company has the obligation to absorb losses of the VIE that could potentially be significant to the VIE. Therefore, the Company is considered the primary beneficiary of the VIE and consolidates the VIE as required by SEC Regulation

S-X

Rule

3A-02

and Accounting Standards Codification (“ASC”) 810.

The following is a summary of the VIE agreements:

Exclusive Option Agreements

Pursuant to the exclusive option agreements entered into between VIE’s nominee shareholders and the WFOE, the nominee shareholders irrevocably granted the WFOE an option to request the nominee shareholders to transfer or sell any part or all of its equity interests in the VIE, or any or all of the assets of the VIE, to the WFOE, or their designees. The purchase price of the equity interests in the VIE is equal to the minimum price required by PRC law. Without the WFOE’s prior written consent, the VIE and its nominee shareholders cannot amend its articles of association, increase or decrease the registered capital, sell or otherwise dispose of its assets or beneficial interest, create or allow any encumbrance on its assets or other beneficial interests and provide any loans or guarantees. The nominee shareholders cannot request any dividends or other form of assets. If dividends or other form of assets were distributed, the nominee shareholders are required to transfer all received distribution to the WFOE or their designees. These agreements are not terminated until all of the equity interest of the VIE is transferred to the WFOE or the person(s) designated by the WFOE. None of the nominee shareholders have the right to terminate or revoke the agreements under any circumstance unless otherwise regulated by law.

Equity Interest Pledge Agreements

Pursuant to the equity interest pledge agreements, each nominee shareholder of the VIE has pledged all of their respective equity interests in the VIE to WFOE as continuing first priority security interest to guarantee the performance of their and the VIE’s obligations under the powers of attorney agreement, the exclusive option agreement and the exclusive business cooperation agreement. WFOE is entitled to all dividends during the effective period of the share pledge except as it agrees otherwise in writing. If VIE or any of the nominee shareholder breaches its contractual obligations, WFOE will be entitled to certain rights regarding the pledged equity interests, including receiving proceeds from the auction or sale of all or part of the pledged equity interests of VIE in accordance with PRC law. None of the nominee shareholders shall, without the prior written consent of WFOE, assign or transfer to any third party, distribute dividends and create or cause any security interest and any liability in whatsoever form to be created on, all or any part of the equity interests it holds in the VIE. This agreement is not terminated until all of the technical support and consulting and service fees have been fully paid under the exclusive business cooperation agreement and all of VIE’s obligations have been terminated under the other controlling agreements. On December 16, 2014, the Company registered the equity pledge with the relevant office of the administration for industry and commerce in accordance with the PRC Property Rights Law.

Exclusive Business Cooperation Agreement

Pursuant to the exclusive business cooperation agreement entered into by WFOE and VIE, WFOE provides exclusive technical support and consulting services in return for an annual service fee based on a certain percentage of the VIE’s audited total operating income, which is adjustable at the sole discretion of WFOE. Without WFOE’s consent, the VIE cannot procure services from any third party or enter into similar service arrangements with any other third party, except for those from WFOE. In addition, the profitable consolidated VIE has granted WFOE an exclusive right to purchase any or all of the business or assets of each of the profitable consolidated VIE at the lowest price permitted under PRC law. This agreement is irrevocable or can only be unilaterally revoked/amended by WFOE.

Powers of Attorney

Pursuant to the powers of attorney signed between VIE’s nominee shareholders and WFOE, each nominee shareholder irrevocably appointed WFOE as

its attorney-in-fact to

exercise on each shareholder’s behalf any and all rights that each shareholder has in respect of its equity interest in VIE (including but not limited to executing the exclusive right to purchase agreements, the voting rights and the right to appoint directors and executive officers of VIE). This agreement is effective and irrevocable as long as the nominee shareholder remains a shareholder of VIE.

In March 2018, the following supplementary agreements were entered into:

Financial Support Agreement

Pursuant to the financial support undertaking letter dated March 28, 2018, the Company is obligated to provide unlimited financial support to the VIE, to the extent permissible under the applicable PRC laws and regulations. The Company will not request repayment of the loans or borrowings if the VIE or its shareholders do not have sufficient funds or are unable to repay.

Shareholder Voting Proxy Agreement

The Nominee Shareholders also

re-signed

the powers of attorney agreement whereby they granted an irrevocable proxy of the voting rights underlying their respective equity interests in VIE from the WFOE to the Company, which includes, but are not limited to, all the shareholders’ rights and voting rights empowered to the Nominee Shareholders by the company law and the Company’s Article of Association.

Accordingly, as a result of the power to direct the activities of the VIE pursuant to the powers of attorney agreement and the obligation to absorb the expected losses of VIE through the unlimited financial support, the WFOE ceased to be the primary beneficiary and the Company became the primary beneficiary of the VIE on March 28, 2018.

In the opinion of the Company’s legal counsel, (i) the ownership structure of the PRC subsidiary and the VIE are in compliance with the existing PRC laws and regulations; (ii) each of the VIE agreements is valid, binding and enforceable in accordance with its terms and applicable PRC laws or regulations and will not violate applicable PRC laws or regulations in effect; and (iii) are valid in accordance with the articles of association of the Company.

However, uncertainties in the PRC legal system could cause the Company’s current ownership structure to be found in violation of existing and/or future PRC laws or regulations and could limit the Company’s ability to enforce its rights under these contractual arrangements. Furthermore, the nominee shareholders of the VIE may have interests that are different than those of the Company, which could potentially increase the risk that they would seek to act contrary to the terms of the contractual agreements with the VIE.

In addition, if the current structure or any of the contractual arrangements is found to be in violation of any existing or future PRC laws or regulations, the Company could be subject to penalties, which could include, but not be limited to, revocation of business and operating licenses, discontinuing or restricting business operations, restricting the Company’s right to collect revenues, temporary or permanent blocking of the Company’s internet platforms, restructuring of the Company’s operations, imposition of additional conditions or requirements with which the Company may not be able to comply, or other regulatory or enforcement actions against the Company that could be harmful to its business. The imposition of any of these or other penalties could have a material adverse effect on the Company’s ability to conduct its business.

The following table set forth the assets and liabilities of the VIE included in the Company’s consolidated balance sheets:


	As of December 31,
	201 8		201 9
	RMB		RMB		US$
ASSETS:
Current assets:
Cash and cash equivalents		31,763		211,314		30,353
Restricted cash		115		115		17
Accounts receivable		141,705		133,745		19,210
Prepayments and other current assets		64,532		73,789		10,599
Amounts due from the Company and its subsidiaries		3,965		51,656		7,420
Amounts due from related parities		2,848		521		75

Total current assets		244,928		471,140		67,674

Non-current assets:
Property and equipment, net		46,271		57,390		8,244
Intangible assets, net		1,406		8,728		1,254
Long-term investments		71,512		108,408		15,572
Other-non current assets		13,529		1,925		277

Total non-current assets		132,718		176,451		25,347

Total assets		377,646		647,591		93,021

LIABILITIES:
Current liabilities:
Accounts payable		18,683		19,974		2,869
Deferred revenue and customer deposits		55,625		73,820		10,604
Accrued liabilities and other current liabilities		59,556		72,580		10,425
Amounts due to the Company and its subsidiaries		15,534		185,263		26,611
Amounts due to related parties		8,864		56		8

Total current liabilities		158,262		351,693		50,517

Non-current liabilities:
Amounts due to the Company and its subsidiaries		240,000		377,000		54,153
Other non-current liabilities		140		64		9

Total non-current liabilities		240,140		377,064		54,162

Total liabilities		398,402		728,757		104,679

The table sets forth the results of operations and cash flows of the VIE included in the

ompany’s consolidated statements of comprehensive loss and cash flows.


	As of December 31,
	2017			2018			201 9
	RMB			RMB			RMB			US$
Revenues		284,348			709,594			900,454			129,342
Cost of revenues		(206,789	)		(499,589	)		(628,109	)		(90,222	)
Net loss		(40,003	)		(16,785	)		(95,829	)		(13,765	)
Net cash (used in)/provided by operating activities		(51,016	)		(68,316	)		16,059			2,307
Net cash used in investing activities		(10,000	)		(104,675	)		(34,451	)		(4,949	)
Net cash provided by financing activities		—			154,901			197,943			28,433

There were no pledges or collateralization of the VIE’s assets as of December 31, 201

and 201

. The amount of net liabilities of the VIE was RMB20,756 and RMB81,166 (US$11,658) as of December 31, 2018 and 2019, respectively. Creditors of the VIE have no recourse to the general credit of the primary beneficiary of the VIE, and such amounts have been parenthetically presented on the face of the consolidated balance sheets. The VIE holds certain assets, including data servers and related equipment for use in their operations. The VIE does not own any facilities except for the rental of certain office premises and data centers from third parties under operating lease arrangements. The VIE also holds certain value-added technology licenses, registered copyrights, trademarks and registered domain names, including the official website, which are also considered as revenue-producing assets. However, none of such assets was recorded on the Company’s consolidated balance sheets as such assets were all internally developed and expensed as incurred as they did not meet the capitalization criteria. The Company has not provided any financial or other support that it was not previously contractually required to provide to the VIE during the periods presented

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2	Summary of Significant Accounting Policies

Basis of presentation

The consolidated financial statements of the Company have been prepared in accordance with the generally accepted accounting principles of the United States (“U.S. GAAP”).

Principles of Consolidation

The consolidated financial statements include the financial statements of the Company, its subsidiaries, and the VIE. All significant intercompany transactions and balances have been eliminated upon consolidation.

Use of estimates

The preparation of the Company’s consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and judgments that affect the reported amounts in the consolidated financial statements and accompanying notes. These estimates form the basis for judgments that management make about the carrying values of assets and liabilities, which are not readily apparent from other sources. Management base their estimates and judgments on historical information and on various other assumptions that they believe are reasonable under the circumstances. U.S. GAAP requires management to make estimates and judgments in several areas, including, but not limited to, those related to allowance for doubtful accounts, volume rebates, useful lives of property and equipment and intangible assets, valuation of intangible asset acquisition, impairment of long-lived assets, fair value measurements for equity investments without readily determinable fair value, impairment of equity investments, valuation allowance for deferred tax assets, uncertain tax position, fair value change of derivative asset and derivative liability, warranties for private cloud-based services and share-based compensation. These estimates are based on management’s knowledge about current events and expectations about actions that the Company may undertake in the future. Actual results could differ from those estimates.

Convenience translation

Translations of amounts from RMB into US$ for the convenience of the reader have been calculated at the exchange rate of RMB6.9618 per US$1.00 on December 31, 201

, as published on the website of the United States Federal Reserve Board. No representation is made that the RMB amounts could have been, or could be, converted into US$ at such rate.

Foreign currency translation

The functional currency of the Company and the Company’s subsidiary outside the PRC are US$. The Company’s PRC subsidiary and VIE adopted RMB as their functional currencies. The determination of the respective functional currency is based on the criteria stated in ASC 830,

Foreign Currency Matters

. The Company uses RMB as its reporting currency. The consolidated financial statements of the Company are translated into RMB using the exchange rate as of the balance sheet date for assets and liabilities and average exchange rate for the year for income and expense items. Translation gains and losses are recorded in accumulated other comprehensive

income

, as a component of shareholders’

equity

Transactions in currencies other than the functional currency are remeasured and recorded in the functional currency at the exchange rate prevailing on the transaction date.

Monetary assets and liabilities denominated in currencies other than the functional currency are remeasured into the functional currency at the rates of exchange prevailing at the balance sheet dates. Transaction gains and losses are recognized in the consolidated statements of comprehensive loss during the period or year in which they occur.

Cash and cash equivalents

Cash and cash equivalents primarily consist of cash and demand deposits which are highly liquid. The Company considers highly liquid investments that are readily convertible to known amounts of cash and with original maturities from the date of purchase of three months or less to be cash equivalents. All cash and cash equivalents are unrestricted as to withdrawal and use.

Restricted cash

Restricted cash represents cash granted by the government for certain approved technology research and development projects. These cash balances are not available for use until the Company obtain

pre-approval

from the government.

Short-term investments

The Company’s short-term investments comprise primarily of bank structured deposits at fixed rates based on the guaranteed interest rate with maturities within twelve months. As of December 31, 2019, there are no short-term investments due to maturity.

Derivative assets

The derivative assets are embedded derivatives separated from the host contract of bank structured deposits. The derivative assets are recorded at fair value. Terms of the derivative assets are related to the gold price index and the assets shall be measured subsequently at fair value. As of December 31, 2019, there are no derivative assets due to maturity of bank structured deposits.

Accounts receivable and allowance for doubtful accounts

Accounts receivable are recorded at the realizable value amount, net of allowances for doubtful accounts. An allowance for doubtful accounts is recorded in the period when loss is probable based on many factors, including the age of the balance, the customer’s payment history and credit quality of the customers, current economic trends and other factors that may affect the Company’s ability to collect from customers. Bad debts are written off after all collection efforts have been exhausted.

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets or the remaining lease term, whichever is shorter. The estimated useful lives of property and equipment are as follows:


Computer equipment and servers		3 – 5 years
Office furniture and equipment		3 – 5 years
Leasehold improvements		over the shorter of lease terms or estimated useful lives of the assets

Expenditures for repair and maintenance are expensed as incurred. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from their respective accounts, and any gain or loss on such sale or disposal is reflected in the consolidated statements of comprehensive loss.

Intangible assets

Intangible assets with finite lives are carried at cost less accumulated amortization. Intangible assets represent purchased computer software. All intangible assets with finite lives are amortized using the straight-line method over the estimated economic lives, which are as follows:

Computer software, systems and acquired technology

1 – 5 years

Residual values are considered nil.

Impairment of long-lived assets other than goodwill

The Company evaluates long-lived assets, such as property and equipment and purchased intangible assets with finite lives, for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable in accordance with ASC 360,

Property, Plant and Equipment

. When such events occur, the Company assesses the recoverability of the asset group based on the undiscounted future cash flow the asset group is expected to generate and recognizes an impairment loss when estimated undiscounted future cash flow expected to result from the use of the asset group plus net proceeds expected from disposition of the asset group, if any, is less than the carrying value of the asset group. If the Company identifies an impairment, the Company reduces the carrying amount of the asset group to its estimated fair value based on a discounted cash flow approach or, when available and appropriate, to comparable market values. The Company uses estimates and judgments in its impairment tests and if different estimates or judgments had been utilized, the timing or the amount of any impairment charges could be different. No impairment loss was recognized

for the years ended December 31, 2017, 2018 and 2019, respectively.

Long-term investments

The Company’s long-term investments consist of equity investments without readily determinable fair value.

Prior to adopting ASC Topic 321,

Investments—Equity Securities

(“ASC 321”) on January 1, 2019, the Company carries at cost its investments in investees which do not have readily determinable fair value and the Company does not have significant influence in accordance with ASC

325-20,

Investments-Other: Cost Method Investments

. The Company only adjusts for other-than-temporary declines in fair value and distributions of earnings that exceed the Company’s share of earnings since its investment.

The Company regularly evaluates the impairment of the cost method investments based on performance and financial position of the investee as well as other evidence of market value. Such evaluation includes, but is not limited to, reviewing the investee’s cash position, recent financing, projected and historical financial performance, cash flow forecasts and financing needs. An impairment loss is recognized in earnings equal to the excess of the investment’s cost over its fair value at the balance sheet date of the reporting period for which the assessment is made. The fair value would then become the new cost basis of investment.

Subsequent to the Company’s adoption of ASC 321 on January 1, 2019, for equity investments without readily determinable fair value and do not qualify for the existing practical expedient in ASC Topic 820,

Fair Value Measurements and Disclosures

(“ASC 820”) to estimate fair value using the net asset value per share (or its equivalent) of the investment, the Company elected to use the measurement alternative to measure those investments at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments of the same issuer, if any.

For those equity investments that the Company elects to use the measurement alternative, the Company makes a qualitative assessment of whether the investment is impaired at each reporting date. If a qualitative assessment indicates that the investment is impaired, the Company has to estimate the investment’s fair value in accordance with the principles of ASC 820. If the fair value is less than the investment’s carrying value, the Company has to recognize an impairment loss in consolidated statements of comprehensive loss equal to the difference between the carrying value and fair value. The impact for the year ended December 31, 2019 was an increase to other income of RMB17,298 (US$2,485) in consolidated statements of comprehensive loss and there was no impact for beginning retained earnings as a result of applying the new accounting standard for certain equity securities, with the impact primarily related to the Company’s equity investment without readily determinable fair value .

Convertible notes

At the commitment date, the fees and expenses associated with the issuance of the convertible notes are recorded as a discount to the debt liability in accordance with ASU

2015-03.

The convertible notes, which is the proceeds net of fees and expenses payable to the creditor and the fair value of the bifurcated derivative, will be accreted to the redemption value on the maturity date using the effective interest method over the estimated life of the debt instrument.

The Company has early adopted ASU

2015-03,

Interest – Imputation of Interest (Subtopic

835-30):

Simplifying the Presentation of Debt Issuance Costs

, and ASU

2017-11,

Accounting for Certain Financial Instruments with Down Round Features.

Accounting for Certain Financial Instruments with Down Round Features. ASU

2015-03

requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. ASU

2017-11

no longer requires the Company to consider down round features when determining whether its embedded Conversion Option is indexed to its own stock.

Value added taxes (“VAT”)

The Company presents VAT assessed by government authorities as reductions of revenues. Pursuant to the PRC tax legislation, VAT is generally imposed in lieu of business tax in the modern service industries, on a nationwide basis. VAT of 6% applies to revenue derived from the provision of certain modern services. The Company is allowed to offset the qualified input VAT paid on taxable purchases against the output VAT chargeable on the modern services provided.

Share split

On March 1, 2017, the board of directors approved a 1 for 10 share split. Share and per share amounts for common shares and contingently redeemable convertible preferred shares disclosed for all prior periods have been retroactively adjusted to reflect the effects of the share split.

Treasury shares

Treasury shares represent shares repurchased by the Company that are no longer outstanding and are held by the Company. Treasury shares are accounted for under the cost method per ASC

505-30

Treasury Stock

. Under this method, repurchase of shares were recorded as treasury shares at historical purchase price. On November 20, 2018, the Board of Directors of the Company approved a plan to repurchase its own issued and outstanding American depositary shares (“ADSs”) up to an aggregate value of US$10 million from the open market (the “Repurchase Plan”). As of December 31, 2019, under the Repurchase Plan, the Company had repurchased an aggregate of 920,606 ADSs, representing 613,737 Class A common shares on the open market for a total cash consideration of US$5.91 million.

Revenue recognition

Starting from January 1, 2019, the Company adopted the new revenue guidance ASC Topic 606

Revenue from Contracts with Customers

(“ASC 606”) using the modified retrospective method, which requires the recognition of a cumulative-effect adjustment to retained earnings as of the date of adoption and applies the adoption only to contracts not completed as of January 1, 2019.

Impact on Adoption of New Revenue Guidance

The impact for the year ended December 31, 2019 was an increase to revenue of RMB3,119 (US$448) and the cumulative impact for beginning retained earnings was RMB4,605 as a result of applying the new revenue standard, with the impact primarily related to the Company’s private cloud-based services.

Under ASC 605, the private cloud-based services is recognized pro rata over post-contract-service period. Under ASC 606, the private cloud-based services is recognized at a point in time when the control of service is obtained by the customer represented by the customer acceptance received by the Company.

The effect of the adoption of ASC 606 as of December 31, 2018 was as follows:


	As of December 31, 2018
Consolidated balance sheet	As previously reported			Balances under ASC 606			Effect of change higher/(lower)
	RMB			RMB			RMB
Accounts receivable, net of allowance for doubtful accounts		141,911			143,543			1,632
Prepayments and other current assets		80,578			80,948			370
Deferred revenue and customer deposits		59,483			56,419			(3,064	)
Accrued liabilities and other current liabilities		76,666			77,126			460
Accumulated deficit		(348,123	)		(343,518	)		4,605

The effect of the adoption of ASC 606 for the current year was as follows:


	Year ended December 31, 2019
Consolidated statement of comprehensive loss	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Revenues		906,458			130,205			903,339			129,757			3,119			448
Cost of revenues		(649,596	)		(93,309	)		(649,487	)		(93,293	)		(109	)		(16	)
Net Loss		(109,841	)		(15,776	)		(112,851	)		(16,208	)		3,010			432
Net loss per share for class A and class B common shares:
Class A common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—
Class B common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—


	As of December 31, 2019
Consolidated balance sheet	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Accounts receivable, net of allowance for doubtful accounts		135,417			19,452			131,088			18,830			4,329			622
Prepayments and other current assets		86,087			12,366			85,494			12,281			593			85
Deferred revenue and customer deposits		(77,561	)		(11,141	)		(81,053	)		(11,643	)		(3,492	)		(502	)
Accrued liabilities and other current liabilities		(96,277	)		(13,829	)		(95,635	)		(13,737	)		642			92
Accumulated deficit		(453,359	)		(65,121	)		(460,974	)		(66,215	)		7,615			1,094
Accumulated other comprehensive income		6,363			914			6,206			891			157			23

Starting from 2019, the Company has changed the classification of revenue in the consolidated statements of comprehensive loss by reclassifying revenue from developer services and other SaaS products, formerly named as other vertical data solutions, to revenues under SaaS products. The Company generates revenues primarily through targeted marketing, and SaaS products. Revenue is recognized when control of promised goods or services is transferred to the Company’s customers in an amount of consideration to which the Company expects to be entitled to in exchange for those goods or services.

Targeted Marketing

The Company generates targeted marketing revenue by providing targeted marketing solution in the form of integrated marketing campaign to advertiser through the

XiaoGuoTong

marketing platform and built upon its multi-dimensional device-level mobile behavioral data or other third-party marketing platforms such as Guangdiantong of Tencent, which is identified as one performance obligation. The ads are displayed on a wide spectrum of reputable publishers, through bidding for ad slots using rates directly negotiated with the various publishers. Moreover, volume rebates to customers under targeted marketing revenue applied on a prospective basis when they recharge their target marketing accounts above a specific threshold are material rights. Such rebates are accounted for as changes in total transaction price and allocated directly to the separate performance obligations.

The Company enters into contractual arrangements with advertisers that stipulate the types of advertising to be delivered and the pricing. Advertising customers pay for the targeted marketing solutions primarily based on

a cost-per-click (CPC)

or cost-per-action (CPA)

basis. Majority of the contract duration is less than one year. For certain arrangements, customers are required to pay the Company before the services are delivered. For other arrangements, the Company provided customers with a credit term less than one year. The Company act as the principal in the targeted marketing arrangements under which the Company has control over the fulfillment of the service and has discretion in establishing price. Accordingly, the Company recognizes revenue on a gross basis and at a point in time once agreed actions are performed. Revenues are presented net of value-added tax collected on behalf of the government.

SaaS products

The Company generates SaaS products revenue primarily from developer services and other SaaS products. For developer services, there are two types contracts, subscription-based contracts and project-based contracts. The Company primarily enters into subscription-based contracts with its customers to provide push notification or instant messaging (collectively “notification services”), which the Company provides its customers with access to its notification services platform. This enables customers to send notifications and messages to users. The Company generally recognizes revenue ratably over time under the subscription-based contracts as stand-ready obligations, because the customer simultaneously receives and consumes the benefits as the Company provides subscription services throughout a fixed contract term. The Company uses an output method of progress based on fixed contract term as it best depicts the transfer of control to the customer.

The Company primarily enters into project-based contracts with its customers to provide private cloud-based developer services, which are designed to provide customizable services to customers who want a more controlled software environment and more comprehensive technology and customer support. The Company provides its customers one combined performance obligation including customized APP push notification system or instant messaging system and related system training services as both performance obligations are incapable of being distinct because the customer cannot drive economic benefit from the related system training services on its own. Meanwhile, the Company also provides post contract assurance-type maintenance services, which usually have a duration of one year. Under ASC 605, the Company recognizes revenue pro rata over post-contract-service period in accordance with ASC

985-605-25.

Under ASC 606, the Company recognize revenue at the point in time when the system is implemented, and the training service is provided, which is represented by the customer acceptance received by the Company. Meanwhile, the estimated cost of assurance-type maintenance services is accrued as “Costs of revenues”, which is not material.

For other SaaS products, the Company enters into agreements with its customers to provide data analytic solutions and there are three types contracts, subscription-based contracts, project-based contracts and consumption-based contracts. The Company primarily enters into subscription-based contracts with its customers to provide customizable service package for a fixed contract term, which allows the customers to subscribe a fixed number of apps to obtain unlimited volume of queries to the Company’s analytic results. The Company generally recognizes revenue ratably over time under the subscription-based contracts, because the customer simultaneously receives and consumes the benefits as the Company provides subscription services throughout a fixed contract term.

The Company primarily enters into project-based contracts with its customers to provide

in-depth

analytics services and generate customized reports based on the customers’ specific requirements. The Company recognizes revenue at the point in time when the customized reports are provided.

The Company primarily enters into consumption-based contracts with its customers to process the queries or provide features based on the customers’ requirements. When the Company receives a placed order, it recognizes revenue at a point in time when the queries are processed, or the features are utilized by the customers.

For certain arrangements, customers are required to pay the Company before the services are delivered. For other arrangements, the Company provided customers with a credit term under one year. Revenues are presented net of value-added tax collected on behalf of the government.

Other Revenue Recognition related policies

Timing of revenue recognition may differ from the timing of invoicing to customers. Some customers are required to pay before the services are delivered to the customer. When either party to a revenue contract has performed, the Company recognizes a contract asset or a contract liability on the consolidated balance sheet, depending on the relationship between the Company’s performance and the customer’s payment.

Contract assets represent amounts related to the Company’s rights to consideration received for private-cloud-based service and are included in “Prepayments and other assets” on the consolidated balance sheets. Amount of contract assets was not material as of January 1, 2019 and December 31, 2019, respectively.

Contract liabilities are mainly related to fees for services to be provided over the service period, which are presented as “Deferred revenue” on the consolidated balance sheets. Revenue recognized for the year ended December 31, 2019 that was included in contract liabilities as of January 1, 2019 was RMB24,256 (US$3,484).

A summary of contract liabilities is as follow:

As of January 1, 2019

As of December 31, 2019

RMB

US$

Contract liabilities

33,067

39,638

5,694

The increase in contract liabilities was primarily due to an increase of consideration received from the customers. Customer deposits relate to customer’s unused balances that are refundable. Once this balance is utilized by the customer, the corresponding amount would be recognized as revenue.

As of December 31, 2019, the Company’s unsatisfied (or partially unsatisfied) performance obligations in contracts with its customers was RMB21,534 (US$3,093). The Company expects to recognize the majority of its remaining performance obligations as revenue within the next year.

Costs of revenues

Cost of revenues consists primarily of the cost of purchasing ad inventory associated with targeted marketing services, bandwidth cost, staff costs and depreciation of servers used for revenue generating services.

Research and development

Research and development expenses are primarily incurred in the development of new services, new features, and general improvement of the Company’s technology infrastructure to support its business operations. Research and development costs are expensed as incurred unless such costs qualify for capitalization as software development costs. In order to qualify for capitalization, (i) the preliminary project should be completed, (ii) management has committed to funding the project and it is probable that the project will be completed and the software will be used to perform the function intended, and (iii) it will result in significant additional functionality in the Company’s services. No research and development costs were capitalized during any of the years presented as the Company has not met all of the necessary capitalization requirements.

Advertising expense

Advertising expenses, including promotion expenses, are charged to “sales and marketing expenses” as incurred. Advertising expenses amounted to RMB5,277, RMB6,697 and RMB17,311 (US$2,847) for the year

ended December 31, 2017, 2018 and 2019, respectively.

Other income

Other income represents government grants and profit-sharing program with Depositary Bank related to ADSs depositary. Government grants are recognized when there is reasonable assurance that the Company will comply with the attached conditions. When the grant relates to an expense item, it is recognized on a systemic basis in the consolidated statement of comprehensive loss over the period necessary to match the grant to the related costs. Where the grant relates to an asset acquisition, it is recognized in the consolidated statements of comprehensive loss in proportion to the depreciation of the related assets. Income from profit- sharing program is recognized as

non-current

deferred revenue

over five-year period as specified in the contract based on certain parameters.

Government grants

Government grants primarily consist of financial grants received from provincial and local governments for operating a business in their jurisdictions and compliance with specific policies promoted by the local governments. For certain government grants, there are no defined rules and regulations to govern the criteria necessary for companies to receive such benefits, and the amount of financial subsidy is determined at the discretion of the relevant government authorities. The government grants of

non-operating

nature with no further conditions to be met are recorded as

non-operating

income in “Other income” when received. The government grants with certain operating conditions are recorded as “Accrued liabilities and other current liabilities” when received and will be recorded as operating income when the conditions are met.

Operating leases

Leases where substantially all the risks and rewards of ownership of assets remain with the lessor are accounted for as operating leases. Rentals applicable to such operating leases are recognized on a straight-line basis over the lease term. The Company had no capital leases during the years presented.

Employee defined contribution plan

Full time employees of the Company in the PRC participate in a government mandated defined contribution plan pursuant to which certain pension benefits, medical care, unemployment insurance, employee housing fund, and other welfare benefits are provided to employees. Chinese labor regulations require that the Company make contributions to the government for these benefits based on a certain percentage of the employee’s salaries. The Company has no legal obligation for the benefits beyond the contributions. The total amount that was expensed as incurred was RMB12,121

RMB17,097

and RMB20,724

(US$2,977) for the years ended December 31, 2017,2018 and 2019, respectively.

Income taxes

The Company accounts for income taxes using the liability approach and recognizes deferred tax assets and liabilities for the expected future consequences of events that have been recognized in the consolidated financial statements or in the Company’s tax returns. Deferred tax assets and liabilities are recognized on the basis of the temporary differences that exist between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements using enacted tax rates in effect for the year end in which the differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in earnings. Deferred tax assets are reduced by a valuation allowance through a charge to income tax expense when, in the opinion of management, it is

more-likely-than-not

that a portion of or all of the deferred tax assets will not be realized. The Company evaluates the potential for recovery of deferred tax assets by estimating the future taxable profits expected and considering prudent and feasible tax planning strategies. The components of the deferred tax assets and liabilities are classified as

non-current.

The Company accounts for uncertainty in income taxes recognized in the consolidated financial statements by applying a

two-step

process to determine the amount of the benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax position is deemed

more-likely-than-not

to be sustained (defined as a likelihood of more than fifty percent of being sustained upon an audit, based on the technical merits of the tax position), the tax position is then assessed to determine the amount of benefits to recognize in the consolidated financial statements. The amount of the benefits that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. Interest and penalties on income taxes will be classified as a component of the provisions for income taxes.

The Company evaluated its income tax uncertainty under ASC 740. ASC 740 clarifies the accounting for uncertainty in income taxes by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. The Company elects to classify interest and penalties related to an uncertain tax position, if and when required, as part of income tax expense in the consolidated statements of comprehensive loss.

The Company did not recognize any income tax due to uncertain tax position or incur any interest and penalties related to potential underpaid income tax expenses during the years presented.

Share-based compensation

In accordance with ASC 718,

Compensation-Stock Compensation,

the Company determines whether an award granted to its employees should be classified and accounted for as a liability award or equity award. The Company’s share-based compensation to its employees which were classified as equity awards were recognized in the consolidated statements of comprehensive loss based on the grant date fair value. The Company’s share-based compensation to its employees which were classified as liability awards were recognized in the consolidated statements of comprehensive loss based on the fair value at each reporting date until settlement. The Company early adopted Accounting Standard Update (“ASU”) ASU

2016-09—

Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

and elected to account for forfeitures as they occur.

A change in any of the terms or conditions of the awards is accounted for as a modification of the award. Incremental compensation cost is measured as the excess, if any, of the fair value of the modified award over the fair value of the original award immediately before its terms are modified, measured based on the fair value of the awards and other pertinent factors at the modification date. For vested awards, the Company recognizes incremental compensation cost in the period the modification occurs. For unvested awards, the Company recognizes over the remaining requisite service period, the sum of the incremental compensation cost and the remaining unrecognized compensation cost for the original award on the modification date. If the fair value of the modified award is lower than the fair value of the original award immediately before modification, the minimum compensation cost the Company recognizes is the cost of the original award.

Fair value measurements

Fair value is the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and the market-based risk measurement or assumptions that market participants would use when pricing the asset or liability.

Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level

1-Quoted

prices in active markets for identical assets or liabilities.

Level

2-Observable

inputs other than quoted prices in active markets, quoted prices for identical or similar assets and liabilities in inactive markets or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level

3-Inputs

that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability.

The carrying amounts of financial assets and liabilities, such as cash equivalents, restricted cash, accounts receivable, other receivables within prepaid expenses and other current assets, balances with related parties, accounts payable, and other payables with accrued liabilities and other current liabilities, approximate their fair values because of the short maturity of these instruments. The carrying amounts of restricted cash

(non-current)

approximate its fair value since it bears interest rates which approximate market interest rates. The carrying amounts of convertible notes were recognized based on residual proceeds after allocation to the derivative liabilities at fair market value. The estimated fair values of the convertible notes are based on a valuation methodology using market approach since it bears interest rates which approximate market interest rates of issuers of similar credit risk profile.

Comprehensive loss

Comprehensive loss is defined as the increase or decrease in equity of the Company during a year from transactions and other events and circumstances excluding transactions resulting from investments by owners and distributions to owners. Accumulated other comprehensive

income

of the Company includes the foreign currency translation adjustments.

Loss per share

In accordance with ASC 260,

Earning per Share

, basic loss per share is computed by dividing net loss attributable to common shareholders by the weighted average number of common shares outstanding during the period using the

two-class

method. Under the

two-class

method, net loss is allocated between common shares based on dividends declared (or accumulated) and participating rights in undistributed earnings as if all the earnings for the reporting period had been distributed. For the year ended December 31, 2019, the

two-class

method is applicable because the Company has two classes of common shares outstanding, Class A and Class B common shares, respectively. The participating rights (liquidation and dividend rights) of the holders of the Company’s Class A and Class B common shares are identical, except with respect to voting. As a result, and in accordance with ASC 260, as the liquidation and dividend rights are identical, the undistributed loss is allocated on a proportionate basis.

Diluted loss per share is computed by dividing net loss attributable to common shareholders as adjusted for the effect of dilutive common equivalent shares, if any, by the weighted average number of common and dilutive common equivalent shares outstanding during the years. Common equivalent shares consist of the common shares issuable upon the conversion of the Company’s contingently redeemable convertible preferred shares and the convertible senior notes using the

if-converted

method and common shares, including partially paid shares, issuable upon the exercise of the share options, using the treasury stock method. Common share equivalents are excluded from the computation of diluted loss per share if their effects would be anti-dilutive.

Concentration of risks

Concentration of credit risk

Financial assets that potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, short-term investments and accounts receivable.

The Company places its cash and cash equivalents with reputable financial institutions which have high-credit ratings. As of December 31, 201

and 201

, the aggregate amount of cash and cash equivalents and restricted cash of RMB331,374 and RMB302,236 (US$43,414), respectively, were held at major financial institutions located in the PRC, and US$35,678 and US$18,578 (RMB129,338), respectively, were deposited with major financial institutions located outside the PRC. There has been no recent history of default related to these financial institutions. The Company continues to monitor the financial strength of the financial institutions. The Company manages credit risk of accounts receivable through ongoing monitoring of the outstanding balances.

Concentration of suppliers

Approximately 81.3%

50.9%

and 57.7%

of advertising costs were paid to three suppliers for the year

ended December 31, 2017

,2018

and 201

, respectively.

Business and economic risk

The Company believes that changes in any of the following areas could have a material adverse effect on the Company’s future consolidated financial position, results of operations or cash flows

changes in the overall demand for services; competitive pressures due to new entrants; advances and new trends in new technologies and industry standards; changes in certain strategic relationships; regulatory considerations and risks associated with the Company’s ability to attract employees necessary to support its growth. The Company’s operations could also be adversely affected by significant political, regulatory, economic and social uncertainties in the PRC.

Currency convertibility risk

Substantially all of the Company’s businesses are transacted in RMB, which is not freely convertible into foreign currencies. All foreign exchange transactions take place either through the People’s Bank of China (“PBOC”) or other authorized financial institution at exchange rates quoted by PBOC. Approval of foreign currency payments by the PBOC or other regulatory institutions requires submitting a payment application form together with suppliers’ invoices and signed contracts.

Foreign currency exchange rate risk

The functional currency and the reporting currency of the Company are the US$ and the RMB, respectively. On June 19, 2010, the PBOC announced the end of the RMB’s de facto peg to the US$, a policy which was instituted in late 2008 in the face of the global financial crisis, to further reform the RMB exchange rate regime and to enhance the RMB’s exchange rate flexibility. On March 15, 2014, the People’s Bank of China announced the widening of the daily trading band for RMB against US$. The appreciation of the US$ against RMB was approximately 1.87% in 201

. Most of the Company’s revenues and costs are denominated in RMB, while a portion of cash and cash equivalents, short-term investments, and accounts payable are denominated in US$. Any significant revaluation of RMB may materially and adversely affect the Company’s consolidated revenues, earnings and financial position in US$.

Segment information

The Company’s chief operating decision maker is the Chief Executive Officer, who makes resource allocation decisions and assesses performance based on the consolidated financial results. As a result, the Company has only one reportable segment.

As the Company generates substantially most of its revenues in the PRC, no geographical segments is presented.

Recently issued accounting pronouncements

As a company with less than US$1.07 billion in revenue for the last fiscal year, the

ompany qualifies as an “emerging growth company” pursuant to the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). An emerging growth company may take advantage of specified reduced reporting and other requirements that are otherwise applicable generally to public companies. These provisions include a provision that an emerging growth company does not need to comply with any new or revised financial accounting standards until such date that a private company is otherwise required to comply with such new or revised accounting standards. The Company will take advantage of the extended transition period.

In February 2016, the FASB issued ASU

No. 2016-02,

Leases (Topic 842)

. This ASU modifies existing guidance for

off-balance

sheet treatment of a lessees’ operating leases by requiring lessees to recognize lease assets and lease liabilities, whilst, lessor accounting is largely unchanged. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. In July 2018, the FASB issued ASU

No. 2018-11,

Leases (Topic 842): Targeted Improvements (

“ASU

2018-11”

)

, which provides another transition method in addition to the existing transition method by allowing entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption consistent with preparers’ requests. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years for public entities. As an “emerging growth company,” or EGC, the Company has elected to take advantage of the extended transition period provided in the Securities Act Section 7(a)(2)(B) for complying with new or revised accounting standards applicable to private companies. In November 2019, the FASB issued ASU

No. 2019-10

Financial Instruments-Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)-Effective Dates

. As

Lease (Topic 842)

is already effective for (a) public business entities;

(b) not-for-profit

entities that have issued or are conduit bond obligors for securities that are traded, listed, or quoted on an exchange or an

over-the-counter-market;

and (c) employee benefit plans that file or furnish financial statements with or to the SEC, the Board retained the existing effective date for those entities, including small reporting companies. ASU

No. 2019-10

defers the effective date for

Lease (Topic 842)

for all other entities by an additional year. Therefore,

Leases (Topic 842)

is now effective for those entities for fiscal years beginning after December 15, 2020, and interim periods within fiscal years beginning after December 15, 2021. The Company currently believes the most significant change will be related to the recognition of

right-of-use

assets and lease liabilities on the Company’s balance sheet for certain

in-scope

operating leases. The Group does not expect any material impact on net assets and the consolidated statement of comprehensive loss as a result of adopting the new standard.

In June 2016, the FASB issued ASU

No. 2016-13,

Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

(“ASU

2016-13”).

Subsequently, the FASB issued ASU

2019-05,

Financial Instruments- Credit Losses (Topic 326)

: Targeted Transition Relief and codification improvements to Topic 326 in ASU

2019-04

and ASU

2018-19.

The amendments update guidance on reporting credit losses for financial assets. These amendments affect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The amendments in this ASU are effective for annual reporting periods beginning January 1, 2023 and interim periods beginning January 1, 2023. The Company does not expect any material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU

No. 2018-13,

Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement

(“ASU

2018-13”),

which modifies the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, including, among other changes, the consideration of costs and benefits when evaluating disclosure requirements. For public companies, the amendments are effective for annual reporting periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted. The Company is in the process of evaluating the impact of adoption of this guidance on its consolidated financial statements and does not expect any material impact on its consolidated financial statement as a result of adopting new standard.

In December 2019, the FASB issued ASU

2019-12,

Income Taxes (Topic 740)

Simplifying the Accounting for Income Taxes

. This guidance removes certain exceptions to the general principles in Topic 740 and enhances and simplifies various aspects of the income tax accounting guidance, including requirements such as tax basis

step-up

in goodwill obtained in a transaction that is not a business combination, ownership changes in investments, and interim-period accounting for enacted changes in tax law. This standard is effective for the Company for the annual reporting periods beginning January 1, 2022 and interim periods beginning January 1, 2023. Early adoption is permitted. The Company does not expect any material impact on the Group’s consolidated financial statements.

In January 2020, the FASB issued ASU

2020-01,

Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323)

and Derivatives and Hedging

(Topic 815)—Clarifying the Interactions

between Topic 321, Topic 323, and Topic 815. This guidance addresses accounting for the transition into and out of the equity method and provides clarification of the interaction of rules for equity securities, the equity method of accounting, and forward contracts and purchase options on certain types of securities. This standard is effective for the Company beginning January 1, 2022 including interim periods within the fiscal year. Early adoption is permitted. The Group does not expect any material impact on the Company’s consolidated financial statements.

Accounts Receivable, Net

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Accounts receivable, net

3	Accounts receivable, net


	As of December 31,
	2018			2019
	RMB			RMB			US$
Accounts receivable		151,219			163,933			23,548
Less: allowance for doubtful accounts		(9,308	)		(28,516	)		(4,096	)

Total accounts receivable, net		141,911			135,417			19,452

The following table presents the movement in the allowance for doubtful accounts:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Balance at beginning of year		3,462			9,308			1,337
Provisions		6,389			20,054			2,881
Write-offs		(543	)		(846	)		(122	)

Balance at end of year		9,308			28,516			4,096

Prepayments and other current assets

12 Months Ended

Dec. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepayments and other current assets

4	Prepayments and other current assets

Prepayments and other current assets consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Prepaid media cost		54,937		45,452		6,529
Prepaid service fee		6,804		9,892		1,421
VAT and other surcharges		12,097		16,266		2,336
Investment in a convertible loan		—		8,000		1,149
Office rental deposit		853		2,321		333
Others		5,887		4,156		598

Total prepayments and other current assets		80,578		86,087		12,366

Property and Equipment, Net

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property and equipment, net

5	Property and equipment, net

Property and equipment consist of the following:


	As of December 31,
	201 8			201 9
	RMB			RMB			US$
Office furniture and equipment		4,920			5,982			859
Computer equipment and servers		111,274			149,947			21,539
Leasehold improvements		7,256			10,595			1,522
Less: Accumulated depreciation		(30,576	)		(60,289	)		(8,660	)

Total property and equipment, net		92,874			106,235			15,260

impairment

charges were recognized on property and equipment for the years ended December 31, 2017, 2018 and 2019, respectively.

Depreciation expense recognized for the years ended December 31, 2017, 2018 and 2019 were RMB8,805, RMB18,084 and RMB30,059 (US$4,318), respectively.

Intangible Assets

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

6	Intangible assets

Intangible assets consist of the following:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Computer software, systems and acquired technology		1,874			11,460			1,646
Less: Accumulated amortization		(343	)		(2,650	)		(381	)

Total intangible assets, net		1,531			8,810			1,265

No impairment charges were recognized on intangible assets for the years ended December 31, 2017, 2018 and 2019, respectively.

The addition of intangible asset RMB8,000 is generated from the acquisition of MLINK business occurred on March 4, 2019,

of which was fully attributed to acquired technology with a useful life

of five years. The Company concluded that all of the fair value of MLINK business’s gross assets acquired is concentrated in a single identifiable intangible asset and therefore not a business pursuant to ASU

2017-01.

The weighted average amortization period of intangible assets were 3 years, 2.6 years and 4.2 years for the years ended December 31, 2017, 2018 and 2019, respectively.

Amortization expense of intangible assets were RMB35, RMB307 and RMB2,307 (US$331), for the years ended December 31, 2017, 2018 and 2019

respectively.

Estimated amortization expense relating to the existing intangible assets with finite lives for each of the next five years is as follows:


	RMB		US$
For the year ending December 31, 2020		2,952		424
2021		2,207		317
2022		1,784		256
2023		1,600		230
2024		267		38

No intangible assets with an indefinite useful life as of December 31, 2018 and 2019.

Long-Term Investments

12 Months Ended

Dec. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Long-Term Investments

7	Long-term investments

Equity investments accounted for at fair value using the measurement alternative

Equity investments without readily determinable fair value were accounted as cost method investments prior to adopting

ASC

321-

Investments—Equity Securities (“ASC 321”)

. As of December 31, 2018, the carrying amount of the Group’s cost method investments was RMB79,696. In accordance with ASC 321, the Group elected to use the measurement alternative to measure such investments at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for identical or similar investments of the same issuer, if any. As of December 31, 2019, the carrying amount of the Group’s equity investments was RMB168,637 (US$24,223), During the year ended December 31, 2019, certain equity investments were remeasured based on observable price changes in orderly transactions for an identical or similar investment of the same issuer and the aggregate carrying amount of these investments was RMB31,375 (US$4,507) as of December 31, 2019.

Total unrealized and realized gains and losses of equity investments with readily determinable fair values in 2019 were as follows:


	For the year ended December 31, 2019
	RMB		US$
Gross unrealized gain (upward adjustment)		17,298		2,485
Gross unrealized loss (downward adjustment)		—		—

Net unrealized gain on equity investments held		17,298		2,485
Net realized gain on equity investments sold		6,778		974

Total net gains recognized in other income, net		24,076		3,459

In 2018 and 2019, the Company acquired a total

5.93%

of the share capital of Zhuoxuan, a non-listed company, for

RMB7,265 (US$1,043).

The Company recognized a fair value gain of RMB3,043

(US$437) in “other income” in 2019 due to the observable price change.

In 2017, the Company acquired 6.25% of the share capital of Shuwei, a

non-listed

company, for RMB10,000

and the Company’s ownership of share in Shuwei decreased to

4.27%

in 2018 due to Shuwei’s subsequent rounds of financing. In 2019, the Company disposed certain portion of equity ownership of Shuwei with the consideration RMB10,000 (US$1,436), and recognized realized gain of RMB6,778 (US$974) and a fair value gain of RMB14,255 (US$2,048) for the remaining portion of equity ownership 2.89% in “other income”.

impairment losses were recognized on equity investments for the years ended December 31, 2017, 2018 and 2019, respectively.

- Definition

The entire disclosure for investment holdings. This includes the long positions of investments for the entity. It contains investments in affiliated and unaffiliated issuers. The investments include securities and non securities (i.e. commodities and futures contracts).

+ References + Details

Deferred Revenue and Customer Deposits

12 Months Ended

Dec. 31, 2019

Revenue Recognition and Deferred Revenue [Abstract]

Deferred Revenue and Customer Deposits

8	Deferred revenue and customer deposits

Deferred revenue and customer deposits consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Deferred revenue		33,067		39,638		5,694
Customer deposits		26,416		37,923		5,447

Total deferred revenue and customer deposits - current		59,483		77,561		11,141

Deferred revenue - non-current		10,265		8,150		1,171

Roll-forward of customers deposits:


	Year ended December 31,
	2018			2019
	RMB			RMB			US$
Balance at beginning of year		20,636			26,416			3,794
Cash received from customers during the year		407,630			419,303			60,229
Revenue recognized during the year		(397,488	)		(399,933	)		(57,447	)
Refunds paid during the year		(4,362	)		(7,863	)		(1,129	)

Balance at end of year		26,416			37,923			5,447

Accrued Liabilities and Other Current Liabilities

12 Months Ended

Dec. 31, 2019

Payables and Accruals [Abstract]

Accrued liabilities and other current liabilities

9	Accrued liabilities and other current liabilities

Accrued liabilities and other current liabilities consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Accrued payroll and welfare payables		51,607		55,507		7,973
Other taxes and surcharge		11,277		16,368		2,351
Service fees		11,130		5,934		852
Acquisition of property and equipment		104		4,351		625
Government grant		—		2,326		334
Rental and property management fee		909		2,115		304
Others		1,639		9,676		1,390

Total accrued liabilities and other current liabilities		76,666		96,277		13,829

Contingently Redeemable Convertible Preferred Shares

12 Months Ended

Dec. 31, 2019

Temporary Equity [Abstract]

Contingently Redeemable Convertible Preferred Shares

10	Contingently redeemable convertible preferred shares

Series A contingently redeemable convertible preferred shares (“Series A preferred shares”)

On November 18, 2014, the Company issued Series

A-1

contingently redeemable convertible preferred shares (“Series

A-1

preferred shares”) of 5,187,780 and 367,780 to IDG-Accel China Growth Fund III L.P and IDG-Accel China III Investors L.P, respectively, at US$0.36 per share for a total consideration of US$2,000.

On January 21, 2015, the Company issued Series

A-2

contingently redeemable convertible preferred shares (“Series

A-2

preferred shares”) of 1,388,890, 1,388,890, 2,593,890 and 183,890 to Elite Bright International Limited, Mandra iBase Limited, IDG-Accel China Growth Fund III L.P and IDG-Accel China III Investors L.P, respectively, at US$0.36 per share for a total consideration of US$2,000.

Series B contingently redeemable convertible preferred shares (“Series B preferred shares”)

On May 13, 2015, the Company issued Series B contingently redeemable convertible preferred shares (“Series B preferred shares”) of 529,100, 529,100, 494,070, 35,030 and 6,349,210 to Elite Bright International Limited, Mandra iBase Limited, IDG-Accel China Growth Fund III L.P, IDG-Accel China III Investors L.P and Greatest Investments Limited, respectively, at US$0.95 per share for a total consideration of US$7,500.

Series C contingently redeemable convertible preferred shares (“Series C preferred shares”)

On April 1, 2016, the Company issued Series

C-1

contingently redeemable convertible preferred shares (“Series

C-1

preferred shares”) of 235,160 and 2,116,400 to Greatest Investments Limited and Shenzhen Guohai Chuangxin Investment Management Limited Corporation, respectively, at US$4.73 for a total consideration of US$11,111.

On October 31, 2016, the Company issued Series

C-2

contingently redeemable convertible preferred shares (“Series

C-2

preferred shares”) of 634,920, 1,693,120 and 211,640 to Mandra iBase Limited, T.C.L. Industries Holdings (H.K.) Ltd and Genesis Ventures Limited, respectively, at US$4.73 per share for a total consideration of US$12,000.

Series D contingently redeemable convertible preferred shares (“Series D preferred shares”)

On October 5, 2017, the Company issued Series D contingently redeemable convertible preferred shares of 28,062, 2,441,572 and 3,089,853 to Fidelity Investment Funds, Fidelity China Special Situations PLC and Fidelity Funds, respectively, at US$5.40 per share for a total consideration of US$30,000.

Dividend rights

Each holder of the Series A, B, C, D preferred shares (collectively “Preferred Shares”) will be entitled to receive

non-cumulative

dividends, prior and in preference to holders of common shares, when declared by the Board of Directors. After payment of the preferential dividends relating to the Preferred Shares have been paid in full, each holder of the Preferred Shares will be entitled to receive dividends payable out of any remaining funds that are legally available when declared by the Board of Directors.

For the periods presented, no dividends were declared by the Company’s Board of Directors on the Preferred Shares.

Voting rights

Each holder of the Preferred Shares are entitled to the number of votes equal to the number of common shares into which such Preferred Shares could be converted at the voting date. Preferred shareholders will vote together with common shareholders, and not as a separate class of series, on all matters put before the shareholders.

Liquidation preference

In the event of any liquidation, dissolution or winding up of the Company or any deemed liquidation event defined as (i) the liquidation, dissolution or

winding-up

of the Company, (ii) the acquisition of the Company (whether by a sale of equity, merger or consolidation) in which in excess of 50% of such Company’s voting power outstanding before such transaction is transferred; (iii) the change of the control right of any Company; or (iv) the sale, lease, transfer or other disposition of all or substantially all of the assets of any Company or the exclusive licensing of substantially all of the Company’s intellectual properties, the assets or surplus funds of the Company available for distribution will be distributed as follows:

The holders of Series D preferred shares are entitled to receive an amount equal to 115% of the Series D Issue Price, plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series C, B and A preferred shares and the common shareholders of the Company.

After the payment to the holders of Series D preferred shares, the holders of Series C preferred shares are entitled to receive an amount equal to 100% of the Issue Price, plus an annual simple return of 10% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series B and A preferred shares and the common shareholders of the Company.

After the payment to the holders of Series C preferred shares, the holders of Series B preferred shares are entitled to receive an amount equal to 125% of the Series B Issue Price, plus an annual compounded return of 6% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series A preferred shares and the common shareholders of the Company.

After the payment to the holders of Series B preferred shares, the holders of Series A preferred shares are entitled to receive an amount equal to 150% of the Series A Issue Price, plus an annual compounded return of 8% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the common shareholders of the Company.

After payment has been made to the holders of the Preferred Shares in accordance with the above, the remaining assets of the Company available for distribution to shareholders shall be distributed ratably among the holders of common shares and Preferred Shares based on the number of common shares into which such Preferred Shares are convertible.

Conversion rights

Each holder of the Preferred Share has the right, at the sole discretion of the holder, to convert at any time and from time to time, all or any portion of the Preferred Shares into common shares based on the then-effective Conversion Price.

The initial conversion price is the stated issuance price for each series of Preferred Shares. The initial conversion ratio is on a one for one basis and subject to adjustments in the event that the Company issues additional common shares through options or convertible instruments for a consideration per share received by the Company less than the original respective conversion prices, as the case may be, in effect on the date of and immediately prior to such issue. In such event, the respective conversion price is reduced, concurrently with such issue, to a price as adjusted according to an agreed-upon formula. The above conversion prices are also subject to adjustments on a proportional basis upon other dilution events.

The Company’s Series C preferred share agreement contained a “Performance Ratchet” whereby if the Company’s PRC GAAP audited revenue was less than (i) RMB80,000 in 2016, or (ii) RMB120,000 in 2017, Weidong Luo and the Company shall compensate the Series C investors in accordance to the specified formula.

In the event of a qualified IPO, each Preferred Share will automatically be converted into common shares.

Redemption right

If the Company shall at any time after the earlier of (i) January 1, 2020 or (ii) the date that is twelve months after the closing of the IPO, receive a written request from the holders of at least 50% or more of the issued and outstanding Preferred Shares (or common shares issued upon the conversion of the Preferred Shares) or Mandra iBased Limited may request in writing that the Company effect a registration for at least 20% of their Registrable Securities on any internationally recognized exchange that is reasonably acceptable to such requesting Preferred Shares and Common Shareholders using its best efforts.

Furthermore, if the Company qualifies for registration on Form

F-3

or Form

S-3

(or any comparable form for Registration in a jurisdiction other than the United States), any Preferred Share holder may request the Company to file, in any jurisdiction in which the Company has had a registered underwritten public offering, a Registration Statement on Form

F-3

or Form

S-3

(or any comparable form for Registration in a jurisdiction other than the United States) using its best efforts.

Redemption of preferred shares

On April 11, 2018, the Company redeemed the 1,738,720 Series C preferred shares held by T.C.L. Industries Holdings (H.K.) Ltd. for an aggregate price of US$9,049. The Company accounted for the difference between the fair value of the consideration paid for the repurchase preferred shares and the carrying value of the preferred shares as an increase to the net loss attributable to ordinary shareholders in the statement of comprehensive loss.

Initial measurement and subsequent accounting for Preferred Shares

The Preferred Shares do not meet the criteria of mandatorily redeemable financial instruments specified in ASC

480-10-S99,

and have been classified as mezzanine equity in the consolidated balance sheets as these Preferred Shares are contingently redeemable upon the occurrence of a conditional event (i.e. Deemed Liquidation Event).

The Preferred Shares were initially measured at fair value. Beneficial conversion features exist when the conversion price of the Preferred Shares is lower than the fair value of the common shares at the commitment date, which is the issuance date in the Company’s case. When a beneficial conversion feature exists as of the commitment date, its intrinsic value is bifurcated from the carrying value of the Preferred Shares as a contribution to additional

paid-in

capital. On the respective commitment dates, the most favorable conversion price used to measure the beneficial conversion feature of the Preferred Shares were higher than the fair value per common share and therefore no beneficial conversion feature was recognized. The Company determined the fair value of common shares with the assistance of an independent third party valuation firm.

Based on the Company’s 2016 PRC GAAP audited financial statements, the “Performance Ratchet” has not been triggered, Weidong Luo and the Company are not required to compensate the Series C holders.

In determining whether to account for an amendment of equity-classified preferred shares as a modification or extinguishment, the Company considers an amendment that results in a greater than 10% change in fair value based on an analysis similar to ASC

470-50

is an extinguishment. An amendment that does not meet this criterion is a modification. The amendment in the redemption dates of Series A and Series B preferred shares at the issuance of Series C preferred shares and the removal of the revenue target for the Series A, Series B and Series C preferred shares at issuance of Series D preferred shares, resulted in a modification (as the amendment did not result in a greater than 10 percent change in cash flows) with no further accounting impact as the modification did not result in a change in the fair value of the related preferred shares.

The Company has elected to accrete the preferred shares to their redemption value over the contractual period since issuance to the earliest redemption date using the effective interest rate method. The accretion to redemption value including cumulative dividends shall be recorded as a reduction of income available to common shareholders in accordance with ASC

480-10-S99

3A.

The Preferred Shares were converted to common shares immediately upon the completion of the Company’s IPO on July 26, 2018.

The movement in the carrying value of the convertible preferred shares is as follows:


Mezzanine equity	Series A			Series B			Series C			Series D			Total
	RMB			RMB			RMB			RMB			RMB
Balance as of December 31, 2017		26,979			52,723			168,317			218,618			466,637
Accretion of Preferred Shares		1,463			4,137			7,441			11,053			24,094
Redemption of Preferred Shares		—			—			(57,234	)		—			(57,234	)
Conversion of Preferred Shares		(28,442	)		(56,860	)		(118,524	)		(229,671	)		(433,497	)
Balance as of December 31, 2018		—			—			—			—			—

Balance as of December 31, 2019		—			—			—			—			—

Share-Based Compensation

12 Months Ended

Dec. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

11	Share-based compensation

Share option plans

2014 Incentive Plan

On July 23

2014, the Company’s board of directors and shareholders approved the 2014 Incentive Plan (the “2014 Plan”). Awards under the 2014 Plan vest to 4 years from the date of grant and expire no more than 10 years after the grant date. The Company reserved a total of 5,500,000 common shares for issuance under the 2014 Plan. As of December 31, 2019,

1,911 shares remain available for grant under the 2014 Plan.

2017 Incentive Plan

On March 1, 2017, the Company’s board of directors and shareholders approved the 2017 Incentive Plan (the “2017 Plan”). Awards under the 2017 Plan vest to 4 years from the date of grant and expire no more than 10 years after the grant date. The Company reserved a total of 6,015,137 common shares for issuance under the 2017 Plan. As of December 31, 2019,

3,174,379 shares remain available of grant under the 2017 Plan.

The exercise price, vesting and other conditions of individual awards are determined by the board of directors or any of the committees appointed by the board of directors to administer the 2014 and 2017 Plans. The awards are subject to multiple service vesting periods arranging from 1 to 4 years, and will expire 10 years after the date of award. Upon the termination of the Grantee’s Continuous Service, the Company has the right to repurchase the vested award or shares obtained.

Share options

The following table summarizes the share option activity for the year ended December 31, 2019:


Options Granted to Employees and Directors	Number of Options		Weighted- Average Exercise Price		Weighted- Average grant-date Fair Value per Option		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
			RMB		RMB				RMB
Outstanding, December 31, 201 8		8,032,458		9.04		12.48		7.47		507,876
Granted		333,077		8.98		50.18		—		—
Forfeited		72,891		36.42		28.52		—		—
Expired		—		—		—		—		—
Exercised		1,113,098		2.74		4.06		—		—
Cancelled		—		—		—		—		—
Outstanding, December 31, 2019		7,179,546		9.74		15.37		6.75		163,589
Vested and expected to vest at December 31, 2019		7,179,546		9.74		15.37		6.75		163,589
Vested at December 31, 2019		5,237,925		5.17		7.90		6.21		137,787

The weighted average grant date fair value of the share options granted during the years ended December 31, 2017, 2018 and 2019 were RMB10.34, RMB45.72 and RMB50.18, respectively.

The aggregate unrecognized share-based compensation expense was RMB33,056 (US$4,748) as of December 31,

2019, which the Company expects to recognize over an estimated weighted-average

period of 2.61 years.

The Company estimates the fair value of each award on grant date using the binomial option pricing model with the assistance of an independent third-party valuation firm. The binominal model requires the input of highly subjective assumptions, including the expected share price volatility and the suboptimal early exercise factor. For expected volatility, the Company has made reference to historical volatilities of several comparable companies. The suboptimal early exercise factor was estimated based on the Company’s expectation of exercise behavior of the grantees. The risk-free rate for periods within the contractual life of the options is based on the market yield of U.S. Treasury Bonds in effect at the time of grant. Prior to th

IPO, the estimated fair value of the ordinary shares, at the option grant dates, were determined by the assistance of an independent third-party valuation firm. Subsequent to the IPO, fair value of the common shares is the price of the Company’s publicly traded shares. The Company’s management is ultimately responsible for the determination of the estimated fair value of its ordinary shares.

The Company recognizes share-based compensation expense using the accelerated recognition method over the requisite service period, which is generally subject to graded vesting.

The following table presents assumptions used to estimate the fair values of share options granted for the years ended December 31, 2017,2018 and 2019:


	2017	2018	2019
Risk-free interest rate	2.27% - 2.41%	2.27% - 2.93%	1.65% - 2.54%
Dividend yield	0%	0%	0%
Expected volatility	46.33% - 47.15%	45.30% - 46.10%	44.23% - 44.71%
Weighted average expected volatility	46.66%	45.98%	44.53%
Expected exercise multiple	2.5	2.5	2.5

(i)	Risk-free interest rate – The risk-free interest rate for periods within the contractual life of the options is based on the US Treasury yield curve in effect at the time of the grant for a term consistent with the contractual term of the awards.

(ii)	Dividend yield – The dividend yield is estimated based on the Company’s expected dividend policy over the expected term of the options.

(iii)

Expected volatility – Expected volatility is estimated based on the historical volatility of common shares of several comparable publicly-traded companies in the same industry.

(iv)	Expected exercise multiple – Expected exercise multiple is estimated based on changes in expected intrinsic value of the option and the likelihood of early exercise by employees.

Restricted share units

Starting from September 4, 2018, the Company granted restricted Class A common shares of the Company (“Restricted Shares”).

A summary of the restricted share units for the year ended December 31, 2019 was stated below:


Restricted Share Units Granted to Employees and Directors	Number of Share Units		Weighted- Average Exercise Price		Weighted- Average grant-date Fair Value per Option		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
			RMB		RMB				RMB
Outstanding, December 31, 2018		12,550		—		54.69		9.68		907

Granted		33,643		—		45.09		—		—
Forfeited				—		—		—		—
Expired				—		—		—		—
Exercised		12,550		—		54.97		—		—
Cancelled		—		—		—		—		—
Outstanding, December 31, 2019		33,643		—		44.98		9.70		1,039
Vested and expected to vest at December 31, 2019		33,643		—		44.98		9.70		1,039

Exercisable at December 31, 2019		—		—		—		—		—

The weighted average grant-date fair value per share of restricted share units granted for the years ended December 31, 2018 and 2019 were RMB54.69 and RMB45.09 (US$ 6.48), respectively.

As of December 31, 2019, there was RMB64 (US$9)

of unrecognized share-based compensation cost related to restricted shares, which the Company expects to recognize over an estimated weighted-average period of one year.

The aggregate fair value of share options and restricted share units vested and recognized as expenses as of December 31, 2017, 2018 and 2019 were RMB8,275, RMB24,561 and RMB47,284 (US$6,792), respectively.

Total intrinsic value of share options and restricted share units exercised for the years ended December 31, 2017, 2018 and 2019 were nil, nil and RMB53,338 (US$7,662), respectively.

Total compensation costs recognized for the year ended December 31, 2017, 2018 and 2019 were as follows:


	Year ended December 31,
	2017		201 8		2019
	RMB		RMB		RMB		US$
Cost of Revenue		—		—		73		10
Research and development		1,408		9,448		12,819		1,841
Sales and marketing		944		3,347		6,040		868
General and administrative		5,923		11,766		28,352		4,073

Total		8,275		24,561		47,284		6,792

Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

12	Income taxes

Cayman Islands

Under the current tax laws of Cayman Islands, the Company and its subsidiaries are not subject to tax on income or capital gains. Besides, upon payment of dividends by the Company to its shareholders, no Cayman Islands withholding tax will be imposed.

British Virgin Islands

Under the current laws of the British Virgin Islands (“BVI”), the Company’s BVI incorporated subsidiary are not subject to tax on income or capital gains arising in BVI. In addition, upon payments of dividends by this entity to its shareholders, no BVI withholding tax will be imposed.

Hong Kong

Under the Hong Kong tax laws, the subsidiary in Hong Kong are subject to the Hong Kong profits tax rate at 16.5% and it may be exempted from income tax on its foreign-derived income and there are no withholding taxes in Hong Kong on remittance of dividends.

China

Effective from January 1, 2008, the PRC’s statutory, Enterprise Income Tax (“EIT”) rate is 25%. In accordance with the implementation rules of EIT Law, a qualified “High and New Technology Enterprise” (“HNTE”) is eligible for a preferential tax rate of 15%. The HNTE certificate is effective for a period of three years. An entity must file required supporting documents with the tax authority and ensure fulfillment of the relevant HNTE criteria before using the preferential rate. An entity could

re-apply

for the HNTE certificate when the prior certificate expires. The certificate of high and new technology enterprise of the VIE was obtained in November 2016 and expired in November 2019. The VIE renewed the HNTE certificate of in December 2019 with a valid period of three years starting from December 2019 onwards. It was entitled to the preferential rate of 15% for 2017, 2018 and 2019. The WFOE in the PRC is subject to the 25% EIT rate.

The Company’s loss before income taxes consists of:


	Year ended December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Cayman Islands		(10,584	)		6,622			(16,716	)		(2,401	)
British Virgin Islands		(2	)		(25	)		(30	)		(4	)
Hong Kong		(34	)		208			(3,097	)		(445	)
China		(83,651	)		(72,972	)		(89,836	)		(12,903	)

Total loss before income taxes		(94,271	)		(66,167	)		(109,679	)		(15,753	)

Composition of income tax expense

The current and deferred portions of income tax expense included in the consolidated statements of comprehensive loss are as follows:


	Year ended December 31,
	2017		2018			2019
	RMB		RMB			RMB			US$
Current income tax expense		—		(35	)		(162	)		(23	)
Deferred tax benefit		3,980		5			—			—

Total income tax (expense)/benefit		3,980		(30	)		(162	)		(23	)

Reconciliation between expenses of income taxes

Reconciliation between the expense of income taxes computed by applying the statutory tax rate to loss before income taxes and the actual provision for income taxes is as follows:


	Year ended December 31,
	2018			2019
	RMB			RMB			US$
Loss before income tax		(66,167	)		(109,679	)		(15,753	)
Income tax expense computed at PRC statutory rate (25%)		(16,542	)		(27,421	)		(3,939	)
International tax rate differential		(1,668	)		4,451			639
Preferential tax rate		6,397			12,845			1,845
Deferred tax items tax rate differential		(6,390	)		(10,157	)		(1,459	)
Research and development super-deduction		(21,559	)		(26,910	)		(3,865	)
Non-deductible expenses		5,701			12,587			1,809
Deferred tax expense		4,073			—			—
Recognition of prior year tax loss		—			(1,939	)		(279	)
Changes in valuation allowance		30,018			36,706			5,272

Income tax expense		30			162			23

Deferred tax assets and liabilities

The tax effects of temporary differences that give rise to the deferred tax balances as of December 31, 2018 and 2019 are as follows:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Deferred tax assets, net
Provision for doubtful debts		2,463			7,484			1,075
Accrued expense		3,737			9,516			1,367
Net operating loss carry forward		78,985			108,101			15,528
Government grant related to assets		54			359			52
Fixed assets depreciation		14			73			10
Estimated liabilities		10			—			—
Net unrealized gain on equity investments held		—			(3,564	)		(512	)
Valuation allowance		(85,263	)		(121,969	)		(17,520	)

Total deferred tax assets, net		—			—			—

The Company operates through its WFOE and VIE and evaluates the potential realization of deferred tax assets on an entity basis. The Company recorded valuation allowance against deferred tax assets of those entities that were in a three-year cumulative financial loss and are not forecasting profits in the near future as of December 31, 2018 and 2019. In making such determination, the Company also evaluated a variety of factors including the Company’s operating history, accumulated deficit, existence of taxable temporary differences and reversal periods.

The Company had deferred tax assets related to net operating loss carry forwards of RMB78,985 and RMB108,101 (US$15,528) from its WFOE and the VIE in China

as of December 31,2018 and 2019,

which can be carried forward to offset taxable income. The net operating loss of WOFE and VIE will expire in years 2020 to 2024 and 2020 to 2029 if not utilized, respectively.

The Company did not record any dividend withholding tax, as there were no undistributed earnings arising from the WFOE noted as of December 31, 2018 and 2019.

As of December 31, 2018 and 2019, the Company concluded that there was no significant tax uncertainties in its consolidated financial results. The Company did not record any interest and penalties related to an uncertain tax position for each of the year

ended December 31,

2017,

2018 and 2019. The Company does not expect the amount of unrecognized tax benefits would increase significantly in the next 12 months. In general, the PRC tax authorities have up to five years to conduct examinations of the tax filings of the Company’s PRC subsidiary and the VIE. Accordingly, the PRC tax filings from 2014 through 2019 remain open to examination by the respective tax authorities. The Company may also be subject to the examinations of the tax filings in other jurisdictions, which are not material to the consolidated financial statements.

Convertible Notes

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Convertible Notes

13	Convertible notes

On April 17, 2018, the Company issued zero coupon convertible notes (the “Convertible Notes”) due 2021 in an aggregate principal amount of US$35,000 to one existing and one new investor. The Convertible Notes will mature on their third anniversary date. Holders of the convertible notes may, at their option during a period starting from the issue date until seven days prior to the maturity of the notes, subject to certain exceptions, convert the notes into common shares of the Company at the then applicable conversion price, which is initially US$11.76 per share, subject to certain anti-dilution and other adjustments (the “Conversion Option”). On the commitment date, the conversion option did not qualify for derivative accounting as the underlying common shares which the Convertible Note could be converted into were not publicly traded nor could they be readily convertible into cash in accordance with ASC

815-15

and ASC

815-40.

Upon the initial public offering, whilst the net settlement criteria is subsequently met, the Conversion Option continued not to qualify for derivative accounting as it meets the scope exception provided for under ASC

815-10-15-74(a).

If no qualified IPO were to occur within two years of the issue date, the outstanding obligation at their principal amount with an amount representing a total internal rate of return of 8% per annum, under the Convertible Notes would be immediately due and payable (“Contingent Redemption Option”). If the event of default as defined in the Convertible Notes were to occur, a simple interest of 15% will accrue on the principal. If the Company fails to deliver and register title to any shares following conversion of any Convertible Note, an interest represents a total internal rate of return of 15% per annum will accrue on the principal (both “Contingent Interest Feature”).

The Company evaluated and determined there were no embedded derivatives requiring bifurcation and to determine if there were any beneficial conversion features (“BCF”).

The Company also evaluated the Contingent Redemption Option and Contingent Interest Feature contained in the Convertible Notes in accordance with ASC 815. Both features qualify for derivative accounting as they are not clearly and closely related to the debt host and will be accounted for as a single compound derivative. At issuance date, the Company recognized a derivative liability of US$3,224, which was subsequently accounted for at fair value with a change in fair value of US$3,224 recognized in current earnings for the year ended December 31, 2018 due to a qualified IPO.

Furthermore, as the most favorable conversion price used to measure the BCF for the Convertible Note was the issuance price of US$11.76, no BCF was recognized for the Convertible Note as the fair value per ordinary share at the commitment date was US$9.87, which was less than the most favorable conversion price.

Both principal amount subsequent to the bifurcation of its compound derivative and the issuance costs are amortized as interest expense using the effective interest rate method through the maturity dates of the convertible notes. The effective interest rate was 4.69%.

The principal amount, debt issuance costs and derivative liability as of December 31, 2019 was as follows:


	As of December 31, 2018			Charge to profit and loss		Foreign currency translation adjustment			As of December 31, 2019
	RMB			RMB		RMB			RMB			US$
Principal amount		240,212			—		3,955			244,167			35,000
Contingent redemption feature and debt issuance costs		(24,033	)		10,178		(281	)		(14,136	)		(1,958	)

Total		216,179			10,178		3,674			230,031			33,042

As of December

2019

, aggregate future principal payments for the Convertible Notes were as follows:


	RMB		US$
1 year (including 1 year)		—		—
1 year to 2 years (including 2 years)		244,167		35,000
Total		244,167		35,000

Commitments and contingencies

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

14	Commitments and contingencies

Operating lease commitments

The Company leases office premises in the PRC under

non-cancellable

operating leases ranging from six months to five years. Payments under operating leases are expensed on a straight-line basis over the periods of the respective leases.

Total operating lease expenses were RMB6,081 and RMB12,120

and

RMB

16,380

(US$2,353) for the year

ended December 31, 2017, 2018 and 2019, respectively.

As of December 31, 2019, future minimum payments under

non-cancellable

operating leases were as follows:



	RMB		US$
2020		10,018		1,439
2021		4,425		636
2022		4,131		593
2023		346		50

Total		18,920		2,718

The Company’s operating lease commitments have no renewal options, rent escalation clauses and restrictions or contingent rents.

Capital commitments

As of December 31, 2019, future minimum payment under

non-cancellable

purchase commitment for consulting service

is RMB3,449 (US$495) and RMB285 (US$41), which is scheduled to be paid within one and two years, respectively.

Share Capital

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Share capital

15	Share capital

As of December 31, 2017, there were 42,666,670 common shares and 27,867,937 preferred shares.

On June 27, 2018, the Company’s shareholders adopted a resolution to approve the Post-Offering Memorandum and Articles of Association, The Post-Offering Memorandum and Articles of Association provide that, the Company’s authorized share capital will be changed into US$500 divided into 5,000,000,000 shares.

On July 26, 2018, the Company completed its IPO on the NASDAQ. The Company offered 9,060,000 ADSs representing 6,040,000 Class A common shares. Upon completion of the IPO, all outstanding 27,867,937 Preferred Shares were converted on a

one-for-one

basis into 27,867,937 Class A common shares, all 42,666,670 outstanding common shares were converted on a

one-for-one

basis into 25,666,481 Class A common shares and 17,000,189 Class B common shares, respectively. Holders of Class A common shares and Class B common shares will have the same rights except for voting and conversion rights. In respect of all matters subject to a shareholder vote, each Class A common share is entitled to one vote, and each Class B common share is entitled to ten votes, voting together as one class. Each Class B common share is convertible into one Class A common share at any time by the holder thereof. Class A common shares are not convertible into Class B common shares under any circumstances. Upon any transfer of Class B common shares by a holder thereof to any person or entity that is not an affiliate of such holder, such Class B common shares shall be automatically and immediately converted into the same number of Class A common shares.

Additionally, on August 30, 2018, the underwriters exercised their over-allotment option and issued more 19,708 Class A common shares.

On April 11, 2018, the Company redeemed the 1,738,720 Series C preferred shares held by T.C.L. Industries Holdings (H.K.) Ltd. for an aggregate price of US$9,049,000.

On November 20, 2018, the Board of Directors of the Company authorized the Repurchase Plan, pursuant to which the Company was authorized to repurchase its own issued and outstanding American depositary shares (“ADSs”) up to an aggregate value of US$10 million from the open market.

As of December 31, 2019, the Company had repurchased under the Repurchase Plan an aggregate of 920,606 ADSs, representing 613,737 Class A common shares.

As of December 31, 2019, the Company has no plan for cancellation of these repurchased shares. These shares were recorded at their purchase cost on the consolidated balance sheets.

As at December 31, 2019

there were 60,106,037 and 17,000,189 Class A and Class B ordinary shares outstanding respectively.

Basic and diluted loss per share is calculated as follows:


	For the year ended December 31, 2017			For the year ended December 31, 2018						For the year ended December 31, 2019
	Common shares			Class A			Class B			Class A						Class B
	RMB			RMB			RMB			RMB			US$			RMB			US$
Numerator:
Net loss attributable to Class A and Class B common shareholders		(90,291	)		(46,606	)		(19,591	)		(85,502	)		(12,282	)		(24,339	)		(3,496	)

Deduct: Accretion of redeemable convertible preferred shares		(26,391	)		(16,963	)		(7,131	)		—			—			—			—

Net loss attributable to common shareholders		(116,682	)		(63,569	)		(26,722	)		(85,502	)		(12,282	)		(24,339	)		(3,496	)

Denominator:
Weighted average number of shares used in calculating basic and diluted loss per share		42,666,670			40,441,999			17,000,189			59,721,341			59,721,341			17,000,189			17,000,189

Basic and diluted loss per share		(2.73	)		(1.57	)		(1.57	)		(1.43	)		(0.21	)		(1.43	)		(0.21	)

For the years ended December 31, 2017, the computation of basic loss per share using the

two-class

method is not applicable as the Company only had one class of common shares and the preferred shares do not have contractual rights and obligations to share in the losses of the Company. For the year ended December 31, 2018 and 2019, the

two-class

method is applicable because the Company has Class A and Class B ordinary shares outstanding, and both classes have contractual rights with regards to dividends and distributions upon liquidation of the Company. The effect of all outstanding preferred shares, share options, restricted share units and convertible notes were excluded from the computation of diluted loss per share for the years ended December 31, 2017, 2018 and 2019 as their effects would be anti-dilutive.

Related Party Transactions

12 Months Ended

Dec. 31, 2019

Related Party Transactions

16	Related party transactions

The table below sets forth the major related parties and their relationships with the Company:


Name of related parties		Relationship
Weidong Luo		Founder, Chief Executive Officer
Fei Chen		Founder, President
Shenzhen Weixunyitong Information Technology Co., Ltd.		Company that is significantly influenced by Weidong Luo
Guangzhou Tianlang Network Technology Co., Ltd.		Company that is significantly influenced by Weidong Luo

Details of related party balances as of December 31, 2018 and 2019 are as follows:

16.1

Amounts due from related parties


	As of December 31,
		2018		2019
		RMB		RMB		US$
Shenzhen Weixunyitong Information Technology Co., Ltd.			1,543		521		75
Guangzhou Tianlang Network Technology Co., Ltd.			1,305		—		—
Fei Chen			1,716		—		—

Total amounts due from related parties			4,564		521		75

16.2 Amounts due to related parties


	As of December 31,
		2018		2019
		RMB		RMB		US$
Shenzhen Weixunyitong Information Technology Co., Ltd.			8,864		56		8

Total amounts due to related parties			8,864		56		8

Details of related party transactions for the years ended December 31, 2017, 2018 and 2019 are as follows:

16.3 Transactions with related parties



			For the year ended December 31,
			2017		2018		2019
			RMB		RMB		RMB		US$
Services provided to:	(i	)
Shenzhen Weixunyitong Information Technology Co., Ltd.				2,752		1,002		—		—
Guangzhou Tianlang Network Technology Co., Ltd.				755		1,542		266		38

Total				3,507		2,544		266		38

Services received from:	(ii	)
Shenzhen Weixunyitong Information Technology Co., Ltd.				672		20,909		11,600		1,666

Office premises leased from:
Shenzhen Weixunyitong Information Technology Co., Ltd.				1,557		475		—		—


Total				2,229		21,384		11,600		1,666

(i)	The Company entered into an agreement with Shenzhen Weixunyitong Information Technology Co., Ltd. to provide targeted marketing services. The Company entered into an agreement with Guangzhou Tianlang Network Technology Co., Ltd. to provide certain data solutions and targeted marketing services.

(ii)	The Company entered into an agreement with Shenzhen Weixunyitong Information Technology Co., Ltd. to purchase ad inventory.

Revenues

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenues

Revenues consist of the following:


	Year ended December 31,
	2017		2018		2019
	RMB		RMB		RMB		US$
Targeted Marketing		221,153		572,796		696,190		100,001

SaaS Products
Developer services		38,795		60,106		93,553		13,438
Other SaaS Products		24,761		81,239		116,715		16,766

Total SaaS Products		63,556		141,345		210,268		30,204

Total revenues		284,709		714,141		906,458		130,205

Timing of revenue recognition for SaaS Products for the year ended December 31, 2019:


	For the year ended December 31, 2019
	RMB		US$
Developer Services
Services delivered at the point in time		24,549		3,526
Services delivered overtime		69,004		9,912

Total developer services		93,553		13,438
Other SaaS Products
Services delivered at the point in time		63,703		9,150
Services delivered overtime		53,012		7,616

Total other SaaS products		116,715		16,766
Total SaaS Products		210,268		30,204

Other income

12 Months Ended

Dec. 31, 2019

Other Income, Nonoperating [Abstract]

Other income

1 8	Other income


	Year ended December 31,
	2017		2018		2019
	RMB		RMB		RMB		US$
Government grants		677		7,483		12,546		1,802
Gain on an equity investment sold		—		—		6,778		974
Unrealized gain on equity investments held		—		—		17,298		2,485
I ncome from ADR profit-sharing program		—		966		2,190		315

Total		677		8,449		38,812		5,576

Fair value measurements

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair value measurements

1 9	Fair value measurements

ASC

820-10,

Fair Value Measurements and Disclosures: Overall

, establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets

Level 2 — Include other inputs that are directly or indirectly observable in the marketplace

Level 3 — Unobservable inputs which are supported by little or no market activity

ASC

820-10

describes three main approaches to measuring the fair value of assets and liabilities: (1) market approach; (2) income approach and (3) cost approach. The market approach uses prices and other relevant information generated from market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts to a single present value amount. The measurement is based on the value indicated by current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace an asset.

Assets and liabilities measured or disclosed at fair value

The Company measures bifurcated embedded redemption feature derivative of convertible notes at fair value on a recurring basis, which is classified within Level 3 as the fair value is measured based on risk-free interest rate, volatility, mature date, conversion price, and other factors. There are no derivative liabilities as of December 31, 2018 and 2019, respectively. For further information on the convertible notes see Note 13.

The Company measures derivative assets at fair value on a recurring basis. The derivative assets are classified within Level 2 as the fair value is measured by using inputs derived from or corroborated by observable market data. There are no derivative assets as of December 31, 2018 and 2019, respectively.

The Company’s

non-financial

long-lived assets, such as intangible assets and fixed assets, would be measured at fair value only if they were determined to be impaired on an other-than-temporary basis. Company uses a combination of valuation methodologies, including market and income approaches based on the Company’s best estimate to determine the fair value of these

non-financial

assets. These nonrecurring fair value measurements use significant unobservable inputs (level 3).

For equity investments accounted for under the measurement alternative, when there are observable price changes in orderly transactions for identical or similar investments of the same issuer, the investments are

re-measured

to fair value (Note 7). The

non-recurring

fair value measurements to the carrying amount of an investment usually requires management to estimate a price adjustment for the different rights and obligations between a similar instrument of the same issuer with an observable price change in an orderly transaction and the investment held by the Company. These

non-recurring

fair value measurements were measured as of the observable transaction dates. The valuation methodologies involved require management to use the observable transaction price at the transaction date and other unobservable inputs (level 3) such as volatility of comparable companies and probability of exit events as it relates to liquidation and redemption preferences.

No assets and liabilities were measured at fair value on a recurring basis as of December 31, 2018.

For the year ended December 31, 2019, assets and liabilities measured or disclosed at fair value are summarized below:


					Fair value measurement or disclosure at December 31, 2019 using
	Total Fair Value at December 31, 2019		Total Fair Value at December 31, 2019		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Fair value adjustment
	RMB		US$		RMB		RMB		RMB		RMB
Fair value measurement — Non-Recurring:
Equity investments accounted for at fair value using the alternative measurement		31,375		4,507		—		—		31,375		17,298

Total assets and liabilities measured at fair value		31,375		4,507		—		—		31,375		17,298

There were no transfers of fair value measurements into or out of Level 3 for the years ended December 31, 2017, 2018 and 2019. The following table presents a reconciliation of the derivative liability measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the years ended December 31, 2018 and 2019:


	Derivative liability RMB
Balance as of December 31, 2017		20,237
Charge to profit and loss		(21,302	)
Foreign exchange translation adjustments		1,065
Balance as of December 31, 2018		—

Balance as of December 31, 2019		—

Balance as of December 31, 2019 in US$		—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Restricted Net Assets

12 Months Ended

Dec. 31, 2019

Restricted Net Assets [Abstract]

Restricted Net Assets

20	Restricted net assets

The Company’s ability to pay dividends is primarily dependent on the Company receiving distributions of funds from its subsidiaries. Relevant PRC statutory laws and regulations permit payments of dividends by the VIE incorporated in PRC only out of their retained earnings, if any, as determined in accordance with PRC accounting standards and regulations. The consolidated results of operations reflected in the consolidated financial statements prepared in accordance with U.S. GAAP differ from those reflected in the statutory financial statements of the Company’s subsidiaries.

Under PRC law, the Company’s subsidiary and VIE located in the PRC (collectively referred as the “PRC entities”) are required to provide for certain statutory reserves, namely a general reserve, an enterprise expansion fund and a staff welfare and bonus fund. The PRC entities are required to allocate at least 10% of their after tax profits on an individual company basis as determined under PRC accounting standards to the statutory reserve and has the right to discontinue allocations to the statutory reserve if such reserve has reached 50% of registered capital on an individual company basis. In addition, the registered capital of the PRC entities is also restricted.

Appropriations to the enterprise expansion fund and staff welfare and bonus fund are at the discretion of the Board of Directors of the subsidiary. The PRC entities are also subject to similar statutory reserve requirements. These reserves can only be used for specific purposes and are not transferable to the Company in the form of loans, advances or cash dividends.

Amounts of net assets restricted include

paid-in

capital and statutory reserve of the Company’s PRC subsidiary and the net assets of the VIE in which the Company has no legal ownership, totaling RMB787,223

and RMB856,141

(US$122,977) as of December 31, 201

and 201

, respectively.

Subsequent Events

12 Months Ended

Dec. 31, 2019

Subsequent Events [Abstract]

Subsequent Events

21	Subsequent events

In early January 2020, an outbreak of a respiratory illness caused by the novel coronavirus

(COVID-19)

was identified in Wuhan, Hubei Province, China, which has spread rapidly to many parts of the world. The Chinese central government and local governments in Wuhan and other cities in China have introduced various temporary measures to contain the coronavirus outbreak, such as extension of the Lunar New Year holiday and travel restrictions, which could impact national and local economics to different degrees. The extent to which

COVID-19

impacts the business and financial results of the Company will depend on future developments, given the uncertainty surrounding the

COVID-19

outbreak, the duration of the business disruption and related financial impact cannot not be reasonably estimated at this time.

Condensed Financial Information of the Parent Company

12 Months Ended

Dec. 31, 2019

Condensed Financial Information Disclosure [Abstract]

Condensed Financial Information of the Parent Company

22	Condensed financial information of the parent company

Basis of presentation

For the presentation of the parent company only condensed financial information, the Company records its investments in subsidiaries and VIE under the equity method of accounting as prescribed in ASC 323,

Investments—Equity Method and Joint Ventures

. Such investments are presented on the condensed balance sheets as “Long-term investments” and the subsidiaries’ and VIE’s losses as “Share of losses of subsidiaries and VIE” on the condensed statements of comprehensive loss.

The subsidiaries did not pay any dividends to the Company for the periods presented.

The Company does not have significant commitments or long-term obligations as of the period end other than those presented.

The parent company only financial statements should be read in conjunction with the Company’s consolidated financial statements.

Condensed Balance Sheets


	As of December 31,
	2018			2019
	RMB			RMB			US$
ASSETS:
Current assets:
Cash and cash equivalents		238,236			114,489			16,445
Due from the entities within the Group		7,030			7,198			1,034
Prepayments and other current assets		4,245			2,528			364

Total current assets		249,511			124,215			17,843

Non-current assets:
Long-term investments		590,752			668,049			95,959
Intangible assets, net		93			62			9

Total non-current assets		590,845			668,111			95,968

Total assets		840,356			792,326			113,811

LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accrued liabilities and other current liabilities		11,542			1,439			207
Due to the entities within the Group		710			44,918			6,452

Total current liabilities		12,252			46,357			6,659

Non-current liabilities:
Deferred revenue - non-current		10,265			8,150			1,171
Convertible notes		216,179			230,031			33,042

Total non-current liabilities		226,444			238,181			34,213

Total liabilities		238,696			284,538			40,872

Shareholders’ equity
Class A common shares (par value of US$0.0001 per share as of December 31, 2018 and 2019; 4,920,000,000 shares authorized as of December 31, 2018 and 2019, 59,547,823 shares and 60,106,037 shares issued and outstanding as of December 31, 2018 and 2019, respectively)		37			37			5
Class B common shares (par value of US$0.0001 per share as of December 31, 2018 and 2019; 30,000,000 shares authorized as of December 31, 2018 and 2019, 17,000,189 shares and 17,000,189 shares issued and outstanding as of December 31, 2018 and 2019)		11			11			2
Treasury shares (46,303 and 81,930 class A common shares as of December 31, 2018 and 2019, respectively)		(3,165	)		(1,999	)		(287	)
Additional paid-in capital		944,500			956,735			137,426
Accumulated deficit		(348,123	)		(453,359	)		(65,121	)
Accumulated other comprehensive income		8,400			6,363			914
Total shareholders’ equity		601,660			507,788			72,939

Total liabilities and shareholders’ equity		840,356			792,326			113,811

Condensed Statements of Comprehensive Loss


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Revenues		—			—			—			—
Cost of Revenues		—			—			—			—

Gross profit		—			—			—			—

Operating expenses
Research and development		—			—			—			—
Sales and marketing		—			—			—			—
General and administrative		(10,076	)		(11,941	)		(14,389	)		(2,067	)
Share of losses of subsidiaries and VIE		(79,916	)		(72,750	)		(93,328	)		(13,404	)

Total operating expenses		(89,992	)		(84.691	)		(107,717	)		(15,471	)

Loss from operations		(89,992	)		(84,691	)		(107,717	)		(15,471	)

Foreign exchange loss, net		(339	)		(186	)		—			—
Interest income		18			3,013			2,754			396
Interest expense		—			(6,599	)		(10,178	)		(1,462	)
Other income		22			964			5,300			761
Change in fair value of derivative liability		—			21,302			—			—

Loss before income taxes		(90,291	)		(66,197	)		(109,841	)		(15,776	)
Income tax expenses		—			—			—			—

Net Loss		(90,291	)		(66,197	)		(109,841	)		(15,776	)

Accretion of contingently redeemable convertible preferred shares		(26,391	)		(24,094	)		—			—


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Net loss attributable to common share holders		(116,682	)		(90,291	)		(109,841	)		(15,776	)

Other comprehensive income (loss)
Foreign currency translation adjustments		(7,563	)		11,688			(2,037	)		(293	)

Total other comprehensive income (loss), net of tax		(7,563	)		11,688			(2,037	)		(293	)

Comprehensive loss		(97,854	)		(54,509	)		(111,878	)		(16,069	)

Condensed Statements of Cash Flows


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Net cash (used in)/ provided by operating activities		(744	)		16,052			15,273			2,194
Net cash used in investing activities		(157,412	)		(535,995	)		(95,412	)		(13,705	)
Net cash provided by/ (used in) from financing activities		217,446			614,884			(33,845	)		(4,862	)
Effect of exchange rate changes		(7,695	)		24,866			(9,763	)		(1,403	)

Net increase/ (decrease) in cash and cash equivalents		51,595			119,807			(123,747	)		(17,776	)

Cash and cash equivalents at the beginning of year		66,834			118,429			238,236			34,221

Cash and cash equivalents at the end of year		118,429			238,236			114,489			16,445

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

+ References + Details

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Basis of presentation

The consolidated financial statements of the Company have been prepared in accordance with the generally accepted accounting principles of the United States (“U.S. GAAP”).

Principles of Consolidation

Use of estimates

Convenience translation

Translations of amounts from RMB into US$ for the convenience of the reader have been calculated at the exchange rate of RMB6.9618 per US$1.00 on December 31, 201

, as published on the website of the United States Federal Reserve Board. No representation is made that the RMB amounts could have been, or could be, converted into US$ at such rate.

Foreign currency translation

Foreign Currency Matters

income

, as a component of shareholders’

equity

Transactions in currencies other than the functional currency are remeasured and recorded in the functional currency at the exchange rate prevailing on the transaction date.

Cash and cash equivalents

Restricted cash

Restricted cash represents cash granted by the government for certain approved technology research and development projects. These cash balances are not available for use until the Company obtain

pre-approval

from the government.

Short-term investments

Derivative assets

Accounts receivable and allowance for doubtful accounts

Property and equipment, net


Computer equipment and servers		3 – 5 years
Office furniture and equipment		3 – 5 years
Leasehold improvements		over the shorter of lease terms or estimated useful lives of the assets

Intangible assets

Computer software, systems and acquired technology

1 – 5 years

Residual values are considered nil.

Impairment of long-lived assets other than goodwill

Property, Plant and Equipment

for the years ended December 31, 2017, 2018 and 2019, respectively.

Long-term Investments

Long-term investments

The Company’s long-term investments consist of equity investments without readily determinable fair value.

Prior to adopting ASC Topic 321,

Investments—Equity Securities

325-20,

Investments-Other: Cost Method Investments

. The Company only adjusts for other-than-temporary declines in fair value and distributions of earnings that exceed the Company’s share of earnings since its investment.

Fair Value Measurements and Disclosures

Deferred revenue and customer deposits

Deferred revenue consists of payments from customers in advance of revenue recognition. Customer deposits relate to customer’s unused balances that are refundable. Once this balance is utilized by the customer, the corresponding amount would be recognized as revenue.

Convertible notes

At the commitment date, the fees and expenses associated with the issuance of the convertible notes are recorded as a discount to the debt liability in accordance with ASU

2015-03.

The Company has early adopted ASU

2015-03,

Interest – Imputation of Interest (Subtopic

835-30):

Simplifying the Presentation of Debt Issuance Costs

, and ASU

2017-11,

Accounting for Certain Financial Instruments with Down Round Features.

Accounting for Certain Financial Instruments with Down Round Features. ASU

2015-03

requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. ASU

2017-11

no longer requires the Company to consider down round features when determining whether its embedded Conversion Option is indexed to its own stock.

Value added taxes ("VAT")

Value added taxes (“VAT”)

Share split

Treasury shares

Treasury shares represent shares repurchased by the Company that are no longer outstanding and are held by the Company. Treasury shares are accounted for under the cost method per ASC

505-30

Treasury Stock

Revenue recognition

Starting from January 1, 2019, the Company adopted the new revenue guidance ASC Topic 606

Revenue from Contracts with Customers

Impact on Adoption of New Revenue Guidance

The effect of the adoption of ASC 606 as of December 31, 2018 was as follows:


	As of December 31, 2018
Consolidated balance sheet	As previously reported			Balances under ASC 606			Effect of change higher/(lower)
	RMB			RMB			RMB
Accounts receivable, net of allowance for doubtful accounts		141,911			143,543			1,632
Prepayments and other current assets		80,578			80,948			370
Deferred revenue and customer deposits		59,483			56,419			(3,064	)
Accrued liabilities and other current liabilities		76,666			77,126			460
Accumulated deficit		(348,123	)		(343,518	)		4,605

The effect of the adoption of ASC 606 for the current year was as follows:


	Year ended December 31, 2019
Consolidated statement of comprehensive loss	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Revenues		906,458			130,205			903,339			129,757			3,119			448
Cost of revenues		(649,596	)		(93,309	)		(649,487	)		(93,293	)		(109	)		(16	)
Net Loss		(109,841	)		(15,776	)		(112,851	)		(16,208	)		3,010			432
Net loss per share for class A and class B common shares:
Class A common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—
Class B common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—


	As of December 31, 2019
Consolidated balance sheet	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Accounts receivable, net of allowance for doubtful accounts		135,417			19,452			131,088			18,830			4,329			622
Prepayments and other current assets		86,087			12,366			85,494			12,281			593			85
Deferred revenue and customer deposits		(77,561	)		(11,141	)		(81,053	)		(11,643	)		(3,492	)		(502	)
Accrued liabilities and other current liabilities		(96,277	)		(13,829	)		(95,635	)		(13,737	)		642			92
Accumulated deficit		(453,359	)		(65,121	)		(460,974	)		(66,215	)		7,615			1,094
Accumulated other comprehensive income		6,363			914			6,206			891			157			23

Targeted Marketing

The Company generates targeted marketing revenue by providing targeted marketing solution in the form of integrated marketing campaign to advertiser through the

XiaoGuoTong

a cost-per-click (CPC)

or cost-per-action (CPA)

SaaS products

985-605-25.

The Company primarily enters into project-based contracts with its customers to provide

in-depth

analytics services and generate customized reports based on the customers’ specific requirements. The Company recognizes revenue at the point in time when the customized reports are provided.

Other Revenue Recognition related policies

A summary of contract liabilities is as follow:

As of January 1, 2019

As of December 31, 2019

RMB

US$

Contract liabilities

33,067

39,638

5,694

Costs of revenues

Research and development

Advertising expenses

Advertising expense

ended December 31, 2017, 2018 and 2019, respectively.

Other income

non-current

deferred revenue

over five-year period as specified in the contract based on certain parameters.

Government grants

non-operating

nature with no further conditions to be met are recorded as

non-operating

Operating leases

Employee defined contribution plan

RMB17,097

and RMB20,724

(US$2,977) for the years ended December 31, 2017,2018 and 2019, respectively.

Income taxes

more-likely-than-not

non-current.

The Company accounts for uncertainty in income taxes recognized in the consolidated financial statements by applying a

two-step

more-likely-than-not

The Company did not recognize any income tax due to uncertain tax position or incur any interest and penalties related to potential underpaid income tax expenses during the years presented.

Share-based compensation

In accordance with ASC 718,

Compensation-Stock Compensation,

2016-09—

Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

and elected to account for forfeitures as they occur.

Fair value measurements

Level

1-Quoted

prices in active markets for identical assets or liabilities.

Level

2-Observable

Level

3-Inputs

that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability.

(non-current)

Comprehensive loss

income

of the Company includes the foreign currency translation adjustments.

Loss per share

In accordance with ASC 260,

Earning per Share

, basic loss per share is computed by dividing net loss attributable to common shareholders by the weighted average number of common shares outstanding during the period using the

two-class

method. Under the

two-class

if-converted

Concentration of risks

Concentration of credit risk

Financial assets that potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, short-term investments and accounts receivable.

The Company places its cash and cash equivalents with reputable financial institutions which have high-credit ratings. As of December 31, 201

and 201

Concentration of suppliers

Approximately 81.3%

50.9%

and 57.7%

of advertising costs were paid to three suppliers for the year

ended December 31, 2017

,2018

and 201

, respectively.

Business and economic risk

The Company believes that changes in any of the following areas could have a material adverse effect on the Company’s future consolidated financial position, results of operations or cash flows

Currency convertibility risk

Foreign currency exchange rate risk

Segment information

As the Company generates substantially most of its revenues in the PRC, no geographical segments is presented.

Recently issued accounting pronouncements

As a company with less than US$1.07 billion in revenue for the last fiscal year, the

In February 2016, the FASB issued ASU

No. 2016-02,

Leases (Topic 842)

. This ASU modifies existing guidance for

off-balance

No. 2018-11,

Leases (Topic 842): Targeted Improvements (

“ASU

2018-11”

)

No. 2019-10

Financial Instruments-Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)-Effective Dates

. As

Lease (Topic 842)

is already effective for (a) public business entities;

(b) not-for-profit

entities that have issued or are conduit bond obligors for securities that are traded, listed, or quoted on an exchange or an

over-the-counter-market;

No. 2019-10

defers the effective date for

Lease (Topic 842)

for all other entities by an additional year. Therefore,

Leases (Topic 842)

right-of-use

assets and lease liabilities on the Company’s balance sheet for certain

in-scope

operating leases. The Group does not expect any material impact on net assets and the consolidated statement of comprehensive loss as a result of adopting the new standard.

In June 2016, the FASB issued ASU

No. 2016-13,

Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

(“ASU

2016-13”).

Subsequently, the FASB issued ASU

2019-05,

Financial Instruments- Credit Losses (Topic 326)

: Targeted Transition Relief and codification improvements to Topic 326 in ASU

2019-04

and ASU

2018-19.

In August 2018, the FASB issued ASU

No. 2018-13,

Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement

(“ASU

2018-13”),

In December 2019, the FASB issued ASU

2019-12,

Income Taxes (Topic 740)

Simplifying the Accounting for Income Taxes

step-up

In January 2020, the FASB issued ASU

2020-01,

Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323)

and Derivatives and Hedging

(Topic 815)—Clarifying the Interactions

Organization and Principal Activities (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Assets and Liabilities of VIE

The following table set forth the assets and liabilities of the VIE included in the Company’s consolidated balance sheets:


	As of December 31,
	201 8		201 9
	RMB		RMB		US$
ASSETS:
Current assets:
Cash and cash equivalents		31,763		211,314		30,353
Restricted cash		115		115		17
Accounts receivable		141,705		133,745		19,210
Prepayments and other current assets		64,532		73,789		10,599
Amounts due from the Company and its subsidiaries		3,965		51,656		7,420
Amounts due from related parities		2,848		521		75

Total current assets		244,928		471,140		67,674

Non-current assets:
Property and equipment, net		46,271		57,390		8,244
Intangible assets, net		1,406		8,728		1,254
Long-term investments		71,512		108,408		15,572
Other-non current assets		13,529		1,925		277

Total non-current assets		132,718		176,451		25,347

Total assets		377,646		647,591		93,021

LIABILITIES:
Current liabilities:
Accounts payable		18,683		19,974		2,869
Deferred revenue and customer deposits		55,625		73,820		10,604
Accrued liabilities and other current liabilities		59,556		72,580		10,425
Amounts due to the Company and its subsidiaries		15,534		185,263		26,611
Amounts due to related parties		8,864		56		8

Total current liabilities		158,262		351,693		50,517

Non-current liabilities:
Amounts due to the Company and its subsidiaries		240,000		377,000		54,153
Other non-current liabilities		140		64		9

Total non-current liabilities		240,140		377,064		54,162

Total liabilities		398,402		728,757		104,679

Summary of Results of Operations and Cash Flows of VIE

The table sets forth the results of operations and cash flows of the VIE included in the

ompany’s consolidated statements of comprehensive loss and cash flows.


	As of December 31,
	2017			2018			201 9
	RMB			RMB			RMB			US$
Revenues		284,348			709,594			900,454			129,342
Cost of revenues		(206,789	)		(499,589	)		(628,109	)		(90,222	)
Net loss		(40,003	)		(16,785	)		(95,829	)		(13,765	)
Net cash (used in)/provided by operating activities		(51,016	)		(68,316	)		16,059			2,307
Net cash used in investing activities		(10,000	)		(104,675	)		(34,451	)		(4,949	)
Net cash provided by financing activities		—			154,901			197,943			28,433

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Property and Equipment

The estimated useful lives of property and equipment are as follows:


Computer equipment and servers		3 – 5 years
Office furniture and equipment		3 – 5 years
Leasehold improvements		over the shorter of lease terms or estimated useful lives of the assets

Schedule of Finite Lived Intangible Assets Estimated Economic Lives

All intangible assets with finite lives are amortized using the straight-line method over the estimated economic lives, which are as follows:

Computer software, systems and acquired technology

1 – 5 years

Residual values are considered nil.

Intangible assets consist of the following:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Computer software, systems and acquired technology		1,874			11,460			1,646
Less: Accumulated amortization		(343	)		(2,650	)		(381	)

Total intangible assets, net		1,531			8,810			1,265

Schedule of Effect of Adoption of ASC 606 on Revenue

The effect of the adoption of ASC 606 as of December 31, 2018 was as follows:


	As of December 31, 2018
Consolidated balance sheet	As previously reported			Balances under ASC 606			Effect of change higher/(lower)
	RMB			RMB			RMB
Accounts receivable, net of allowance for doubtful accounts		141,911			143,543			1,632
Prepayments and other current assets		80,578			80,948			370
Deferred revenue and customer deposits		59,483			56,419			(3,064	)
Accrued liabilities and other current liabilities		76,666			77,126			460
Accumulated deficit		(348,123	)		(343,518	)		4,605

The effect of the adoption of ASC 606 for the current year was as follows:


	Year ended December 31, 2019
Consolidated statement of comprehensive loss	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Revenues		906,458			130,205			903,339			129,757			3,119			448
Cost of revenues		(649,596	)		(93,309	)		(649,487	)		(93,293	)		(109	)		(16	)
Net Loss		(109,841	)		(15,776	)		(112,851	)		(16,208	)		3,010			432
Net loss per share for class A and class B common shares:
Class A common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—
Class B common shares - basic and diluted		(1.43	)		(0.21	)		(1.47	)		(0.21	)		0.04			—


	As of December 31, 2019
Consolidated balance sheet	Balances under ASC 606 (As reported)						Balances under ASC 605						Effect of change higher/(lower)
	RMB			US$			RMB			US$			RMB			US$
Accounts receivable, net of allowance for doubtful accounts		135,417			19,452			131,088			18,830			4,329			622
Prepayments and other current assets		86,087			12,366			85,494			12,281			593			85
Deferred revenue and customer deposits		(77,561	)		(11,141	)		(81,053	)		(11,643	)		(3,492	)		(502	)
Accrued liabilities and other current liabilities		(96,277	)		(13,829	)		(95,635	)		(13,737	)		642			92
Accumulated deficit		(453,359	)		(65,121	)		(460,974	)		(66,215	)		7,615			1,094
Accumulated other comprehensive income		6,363			914			6,206			891			157			23

Summary of Contract Liabilities

A summary of contract liabilities is as follow:

As of January 1, 2019

As of December 31, 2019

RMB

US$

Contract liabilities

33,067

39,638

5,694

- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References + Details

Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Schedule of Accounts Receivable


	As of December 31,
	2018			2019
	RMB			RMB			US$
Accounts receivable		151,219			163,933			23,548
Less: allowance for doubtful accounts		(9,308	)		(28,516	)		(4,096	)

Total accounts receivable, net		141,911			135,417			19,452

Schedule of Movement in Allowance for Doubtful Accounts

The following table presents the movement in the allowance for doubtful accounts:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Balance at beginning of year		3,462			9,308			1,337
Provisions		6,389			20,054			2,881
Write-offs		(543	)		(846	)		(122	)

Balance at end of year		9,308			28,516			4,096

Prepayments and other current assets (Tables)

12 Months Ended

Dec. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepayment and Other Current Assets

Prepayments and other current assets consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Prepaid media cost		54,937		45,452		6,529
Prepaid service fee		6,804		9,892		1,421
VAT and other surcharges		12,097		16,266		2,336
Investment in a convertible loan		—		8,000		1,149
Office rental deposit		853		2,321		333
Others		5,887		4,156		598

Total prepayments and other current assets		80,578		86,087		12,366

Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consist of the following:


	As of December 31,
	201 8			201 9
	RMB			RMB			US$
Office furniture and equipment		4,920			5,982			859
Computer equipment and servers		111,274			149,947			21,539
Leasehold improvements		7,256			10,595			1,522
Less: Accumulated depreciation		(30,576	)		(60,289	)		(8,660	)

Total property and equipment, net		92,874			106,235			15,260

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References + Details

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite Lived Intangible Assets Estimated Economic Lives

All intangible assets with finite lives are amortized using the straight-line method over the estimated economic lives, which are as follows:

Computer software, systems and acquired technology

1 – 5 years

Residual values are considered nil.

Intangible assets consist of the following:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Computer software, systems and acquired technology		1,874			11,460			1,646
Less: Accumulated amortization		(343	)		(2,650	)		(381	)

Total intangible assets, net		1,531			8,810			1,265

Schedule of Estimated Amortization Expense Related to the Existing Intangible Assets

Estimated amortization expense relating to the existing intangible assets with finite lives for each of the next five years is as follows:


	RMB		US$
For the year ending December 31, 2020		2,952		424
2021		2,207		317
2022		1,784		256
2023		1,600		230
2024		267		38

- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References + Details

Long-Term Investments (Tables)

12 Months Ended

Dec. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Other Income Net


	For the year ended December 31, 2019
	RMB		US$
Gross unrealized gain (upward adjustment)		17,298		2,485
Gross unrealized loss (downward adjustment)		—		—

Net unrealized gain on equity investments held		17,298		2,485
Net realized gain on equity investments sold		6,778		974

Total net gains recognized in other income, net		24,076		3,459

Deferred Revenue and Customer Deposits (Tables)

12 Months Ended

Dec. 31, 2019

Revenue Recognition and Deferred Revenue [Abstract]

Deferred Revenue, by Arrangement

Deferred revenue and customer deposits consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Deferred revenue		33,067		39,638		5,694
Customer deposits		26,416		37,923		5,447

Total deferred revenue and customer deposits - current		59,483		77,561		11,141

Deferred revenue - non-current		10,265		8,150		1,171

Schedule of Roll Forward of Customer Deposits

Roll-forward of customers deposits:


	Year ended December 31,
	2018			2019
	RMB			RMB			US$
Balance at beginning of year		20,636			26,416			3,794
Cash received from customers during the year		407,630			419,303			60,229
Revenue recognized during the year		(397,488	)		(399,933	)		(57,447	)
Refunds paid during the year		(4,362	)		(7,863	)		(1,129	)

Balance at end of year		26,416			37,923			5,447

Accrued Liabilities and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities and Other Current Liabilities

Accrued liabilities and other current liabilities consist of the following:


	As of December 31,
	2018		2019
	RMB		RMB		US$
Accrued payroll and welfare payables		51,607		55,507		7,973
Other taxes and surcharge		11,277		16,368		2,351
Service fees		11,130		5,934		852
Acquisition of property and equipment		104		4,351		625
Government grant		—		2,326		334
Rental and property management fee		909		2,115		304
Others		1,639		9,676		1,390

Total accrued liabilities and other current liabilities		76,666		96,277		13,829

Contingently Redeemable Convertible Preferred Shares (Tables)

12 Months Ended

Dec. 31, 2019

Temporary Equity [Abstract]

Schedule of Movement in Carrying Value of Convertible Preferred Shares

The movement in the carrying value of the convertible preferred shares is as follows:


Mezzanine equity	Series A			Series B			Series C			Series D			Total
	RMB			RMB			RMB			RMB			RMB
Balance as of December 31, 2017		26,979			52,723			168,317			218,618			466,637
Accretion of Preferred Shares		1,463			4,137			7,441			11,053			24,094
Redemption of Preferred Shares		—			—			(57,234	)		—			(57,234	)
Conversion of Preferred Shares		(28,442	)		(56,860	)		(118,524	)		(229,671	)		(433,497	)
Balance as of December 31, 2018		—			—			—			—			—

Balance as of December 31, 2019		—			—			—			—			—

- Definition

Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References + Details

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Share Option Activity

The following table summarizes the share option activity for the year ended December 31, 2019:


Options Granted to Employees and Directors	Number of Options		Weighted- Average Exercise Price		Weighted- Average grant-date Fair Value per Option		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
			RMB		RMB				RMB
Outstanding, December 31, 201 8		8,032,458		9.04		12.48		7.47		507,876
Granted		333,077		8.98		50.18		—		—
Forfeited		72,891		36.42		28.52		—		—
Expired		—		—		—		—		—
Exercised		1,113,098		2.74		4.06		—		—
Cancelled		—		—		—		—		—
Outstanding, December 31, 2019		7,179,546		9.74		15.37		6.75		163,589
Vested and expected to vest at December 31, 2019		7,179,546		9.74		15.37		6.75		163,589
Vested at December 31, 2019		5,237,925		5.17		7.90		6.21		137,787

Schedule of Assumptions Used to Estimate Fair Values of Share Options Granted

The following table presents assumptions used to estimate the fair values of share options granted for the years ended December 31, 2017,2018 and 2019:


	2017	2018	2019
Risk-free interest rate	2.27% - 2.41%	2.27% - 2.93%	1.65% - 2.54%
Dividend yield	0%	0%	0%
Expected volatility	46.33% - 47.15%	45.30% - 46.10%	44.23% - 44.71%
Weighted average expected volatility	46.66%	45.98%	44.53%
Expected exercise multiple	2.5	2.5	2.5

(i)	Risk-free interest rate – The risk-free interest rate for periods within the contractual life of the options is based on the US Treasury yield curve in effect at the time of the grant for a term consistent with the contractual term of the awards.

(ii)	Dividend yield – The dividend yield is estimated based on the Company’s expected dividend policy over the expected term of the options.

(iii)

Expected volatility – Expected volatility is estimated based on the historical volatility of common shares of several comparable publicly-traded companies in the same industry.

(iv)	Expected exercise multiple – Expected exercise multiple is estimated based on changes in expected intrinsic value of the option and the likelihood of early exercise by employees.

Summary of Restricted Share Units

A summary of the restricted share units for the year ended December 31, 201

was stated below:


Restricted Share Units Granted to Employees and Directors	Number of Share Units		Weighted- Average Exercise Price		Weighted- Average grant-date Fair Value per Option		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
			RMB		RMB				RMB
Outstanding, December 31, 2018		12,550		—		54.69		9.68		907

Granted		33,643		—		45.09		—		—
Forfeited				—		—		—		—
Expired				—		—		—		—
Exercised		12,550		—		54.97		—		—
Cancelled		—		—		—		—		—
Outstanding, December 31, 2019		33,643		—		44.98		9.70		1,039
Vested and expected to vest at December 31, 2019		33,643		—		44.98		9.70		1,039

Exercisable at December 31, 2019		—		—		—		—		—

Summary of Total Compensation Costs Recognized

Total compensation costs recognized for the year ended December 31, 2017, 2018 and 2019 were as follows:


	Year ended December 31,
	2017		201 8		2019
	RMB		RMB		RMB		US$
Cost of Revenue		—		—		73		10
Research and development		1,408		9,448		12,819		1,841
Sales and marketing		944		3,347		6,040		868
General and administrative		5,923		11,766		28,352		4,073

Total		8,275		24,561		47,284		6,792

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References + Details

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References + Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Summary of Profit / (Loss) Before Income Taxes

The Company’s loss before income taxes consists of:


	Year ended December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Cayman Islands		(10,584	)		6,622			(16,716	)		(2,401	)
British Virgin Islands		(2	)		(25	)		(30	)		(4	)
Hong Kong		(34	)		208			(3,097	)		(445	)
China		(83,651	)		(72,972	)		(89,836	)		(12,903	)

Total loss before income taxes		(94,271	)		(66,167	)		(109,679	)		(15,753	)

Summary of Composition of Income Tax Expense

The current and deferred portions of income tax expense included in the consolidated statements of comprehensive loss are as follows:


	Year ended December 31,
	2017		2018			2019
	RMB		RMB			RMB			US$
Current income tax expense		—		(35	)		(162	)		(23	)
Deferred tax benefit		3,980		5			—			—

Total income tax (expense)/benefit		3,980		(30	)		(162	)		(23	)

Summary of Reconciliation Between Expenses of Income Taxes

Reconciliation between the expense of income taxes computed by applying the statutory tax rate to loss before income taxes and the actual provision for income taxes is as follows:


	Year ended December 31,
	2018			2019
	RMB			RMB			US$
Loss before income tax		(66,167	)		(109,679	)		(15,753	)
Income tax expense computed at PRC statutory rate (25%)		(16,542	)		(27,421	)		(3,939	)
International tax rate differential		(1,668	)		4,451			639
Preferential tax rate		6,397			12,845			1,845
Deferred tax items tax rate differential		(6,390	)		(10,157	)		(1,459	)
Research and development super-deduction		(21,559	)		(26,910	)		(3,865	)
Non-deductible expenses		5,701			12,587			1,809
Deferred tax expense		4,073			—			—
Recognition of prior year tax loss		—			(1,939	)		(279	)
Changes in valuation allowance		30,018			36,706			5,272

Income tax expense		30			162			23

Summary of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to the deferred tax balances as of December 31, 2018 and 2019 are as follows:


	As of December 31,
	2018			2019
	RMB			RMB			US$
Deferred tax assets, net
Provision for doubtful debts		2,463			7,484			1,075
Accrued expense		3,737			9,516			1,367
Net operating loss carry forward		78,985			108,101			15,528
Government grant related to assets		54			359			52
Fixed assets depreciation		14			73			10
Estimated liabilities		10			—			—
Net unrealized gain on equity investments held		—			(3,564	)		(512	)
Valuation allowance		(85,263	)		(121,969	)		(17,520	)

Total deferred tax assets, net		—			—			—

- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References + Details

Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Summary of Principal Amount, Debt Issuance Costs and Derivative Liability

The principal amount, debt issuance costs and derivative liability as of December 31, 2019 was as follows:


	As of December 31, 2018			Charge to profit and loss		Foreign currency translation adjustment			As of December 31, 2019
	RMB			RMB		RMB			RMB			US$
Principal amount		240,212			—		3,955			244,167			35,000
Contingent redemption feature and debt issuance costs		(24,033	)		10,178		(281	)		(14,136	)		(1,958	)

Total		216,179			10,178		3,674			230,031			33,042

Summary of Aggregate Future Principal Payments for the Convertible Notes

As of December

2019

, aggregate future principal payments for the Convertible Notes were as follows:


	RMB		US$
1 year (including 1 year)		—		—
1 year to 2 years (including 2 years)		244,167		35,000
Total		244,167		35,000

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
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-Paragraph 2
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+ Details

Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Payments Under Non-cancelable Operating Leases

As of December 31, 2019, future minimum payments under

non-cancellable

operating leases were as follows:



	RMB		US$
2020		10,018		1,439
2021		4,425		636
2022		4,131		593
2023		346		50

Total		18,920		2,718

Share Capital (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Basic and Diluted Loss Per Share

Basic and diluted loss per share is calculated as follows:


	For the year ended December 31, 2017			For the year ended December 31, 2018						For the year ended December 31, 2019
	Common shares			Class A			Class B			Class A						Class B
	RMB			RMB			RMB			RMB			US$			RMB			US$
Numerator:
Net loss attributable to Class A and Class B common shareholders		(90,291	)		(46,606	)		(19,591	)		(85,502	)		(12,282	)		(24,339	)		(3,496	)

Deduct: Accretion of redeemable convertible preferred shares		(26,391	)		(16,963	)		(7,131	)		—			—			—			—

Net loss attributable to common shareholders		(116,682	)		(63,569	)		(26,722	)		(85,502	)		(12,282	)		(24,339	)		(3,496	)

Denominator:
Weighted average number of shares used in calculating basic and diluted loss per share		42,666,670			40,441,999			17,000,189			59,721,341			59,721,341			17,000,189			17,000,189

Basic and diluted loss per share		(2.73	)		(1.57	)		(1.57	)		(1.43	)		(0.21	)		(1.43	)		(0.21	)

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Amount Due From Related Party

16.1

Amounts due from related parties


	As of December 31,
		2018		2019
		RMB		RMB		US$
Shenzhen Weixunyitong Information Technology Co., Ltd.			1,543		521		75
Guangzhou Tianlang Network Technology Co., Ltd.			1,305		—		—
Fei Chen			1,716		—		—

Total amounts due from related parties			4,564		521		75

Schedule of Amount Due to Related Party

16.2 Amounts due to related parties


	As of December 31,
		2018		2019
		RMB		RMB		US$
Shenzhen Weixunyitong Information Technology Co., Ltd.			8,864		56		8

Total amounts due to related parties			8,864		56		8

Schedule of Transactions With Related Parties

16.3 Transactions with related parties



			For the year ended December 31,
			2017		2018		2019
			RMB		RMB		RMB		US$
Services provided to:	(i	)
Shenzhen Weixunyitong Information Technology Co., Ltd.				2,752		1,002		—		—
Guangzhou Tianlang Network Technology Co., Ltd.				755		1,542		266		38

Total				3,507		2,544		266		38

Services received from:	(ii	)
Shenzhen Weixunyitong Information Technology Co., Ltd.				672		20,909		11,600		1,666

Office premises leased from:
Shenzhen Weixunyitong Information Technology Co., Ltd.				1,557		475		—		—


Total				2,229		21,384		11,600		1,666

(i)	The Company entered into an agreement with Shenzhen Weixunyitong Information Technology Co., Ltd. to provide targeted marketing services. The Company entered into an agreement with Guangzhou Tianlang Network Technology Co., Ltd. to provide certain data solutions and targeted marketing services.

(ii)	The Company entered into an agreement with Shenzhen Weixunyitong Information Technology Co., Ltd. to purchase ad inventory.

Revenues (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Revenues

Revenues consist of the following:


	Year ended December 31,
	2017		2018		2019
	RMB		RMB		RMB		US$
Targeted Marketing		221,153		572,796		696,190		100,001

SaaS Products
Developer services		38,795		60,106		93,553		13,438
Other SaaS Products		24,761		81,239		116,715		16,766

Total SaaS Products		63,556		141,345		210,268		30,204

Total revenues		284,709		714,141		906,458		130,205

Schedule of Timing of Revenue Recognition

Timing of revenue recognition for SaaS Products for the year ended December 31, 2019:


	For the year ended December 31, 2019
	RMB		US$
Developer Services
Services delivered at the point in time		24,549		3,526
Services delivered overtime		69,004		9,912

Total developer services		93,553		13,438
Other SaaS Products
Services delivered at the point in time		63,703		9,150
Services delivered overtime		53,012		7,616

Total other SaaS products		116,715		16,766
Total SaaS Products		210,268		30,204

Other income (Tables)

12 Months Ended

Dec. 31, 2019

Other Income, Nonoperating [Abstract]

Schedule of Other Nonoperating Income, by Component


	Year ended December 31,
	2017		2018		2019
	RMB		RMB		RMB		US$
Government grants		677		7,483		12,546		1,802
Gain on an equity investment sold		—		—		6,778		974
Unrealized gain on equity investments held		—		—		17,298		2,485
I ncome from ADR profit-sharing program		—		966		2,190		315

Total		677		8,449		38,812		5,576

Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Summary of Assets And Liabilities Measured Or Disclosed At Fair Value

For the year ended December 31, 2019, assets and liabilities measured or disclosed at fair value are summarized below:


					Fair value measurement or disclosure at December 31, 2019 using
	Total Fair Value at December 31, 2019		Total Fair Value at December 31, 2019		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Fair value adjustment
	RMB		US$		RMB		RMB		RMB		RMB
Fair value measurement — Non-Recurring:
Equity investments accounted for at fair value using the alternative measurement		31,375		4,507		—		—		31,375		17,298

Total assets and liabilities measured at fair value		31,375		4,507		—		—		31,375		17,298

Summary of Changes in Fair Value of Redemption Feature Derivative Liability


	Derivative liability RMB
Balance as of December 31, 2017		20,237
Charge to profit and loss		(21,302	)
Foreign exchange translation adjustments		1,065
Balance as of December 31, 2018		—

Balance as of December 31, 2019		—

Balance as of December 31, 2019 in US$		—

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References + Details

Condensed Financial Information of the Parent Company (Tables)

12 Months Ended

Dec. 31, 2019

Condensed Financial Information Disclosure [Abstract]

Condensed Balance Sheets


	As of December 31,
	2018			2019
	RMB			RMB			US$
ASSETS:
Current assets:
Cash and cash equivalents		238,236			114,489			16,445
Due from the entities within the Group		7,030			7,198			1,034
Prepayments and other current assets		4,245			2,528			364

Total current assets		249,511			124,215			17,843

Non-current assets:
Long-term investments		590,752			668,049			95,959
Intangible assets, net		93			62			9

Total non-current assets		590,845			668,111			95,968

Total assets		840,356			792,326			113,811

LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accrued liabilities and other current liabilities		11,542			1,439			207
Due to the entities within the Group		710			44,918			6,452

Total current liabilities		12,252			46,357			6,659

Non-current liabilities:
Deferred revenue - non-current		10,265			8,150			1,171
Convertible notes		216,179			230,031			33,042

Total non-current liabilities		226,444			238,181			34,213

Total liabilities		238,696			284,538			40,872

Shareholders’ equity
Class A common shares (par value of US$0.0001 per share as of December 31, 2018 and 2019; 4,920,000,000 shares authorized as of December 31, 2018 and 2019, 59,547,823 shares and 60,106,037 shares issued and outstanding as of December 31, 2018 and 2019, respectively)		37			37			5
Class B common shares (par value of US$0.0001 per share as of December 31, 2018 and 2019; 30,000,000 shares authorized as of December 31, 2018 and 2019, 17,000,189 shares and 17,000,189 shares issued and outstanding as of December 31, 2018 and 2019)		11			11			2
Treasury shares (46,303 and 81,930 class A common shares as of December 31, 2018 and 2019, respectively)		(3,165	)		(1,999	)		(287	)
Additional paid-in capital		944,500			956,735			137,426
Accumulated deficit		(348,123	)		(453,359	)		(65,121	)
Accumulated other comprehensive income		8,400			6,363			914
Total shareholders’ equity		601,660			507,788			72,939

Total liabilities and shareholders’ equity		840,356			792,326			113,811

Condensed Statements of Comprehensive Loss


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Revenues		—			—			—			—
Cost of Revenues		—			—			—			—

Gross profit		—			—			—			—

Operating expenses
Research and development		—			—			—			—
Sales and marketing		—			—			—			—
General and administrative		(10,076	)		(11,941	)		(14,389	)		(2,067	)
Share of losses of subsidiaries and VIE		(79,916	)		(72,750	)		(93,328	)		(13,404	)

Total operating expenses		(89,992	)		(84.691	)		(107,717	)		(15,471	)

Loss from operations		(89,992	)		(84,691	)		(107,717	)		(15,471	)

Foreign exchange loss, net		(339	)		(186	)		—			—
Interest income		18			3,013			2,754			396
Interest expense		—			(6,599	)		(10,178	)		(1,462	)
Other income		22			964			5,300			761
Change in fair value of derivative liability		—			21,302			—			—

Loss before income taxes		(90,291	)		(66,197	)		(109,841	)		(15,776	)
Income tax expenses		—			—			—			—

Net Loss		(90,291	)		(66,197	)		(109,841	)		(15,776	)

Accretion of contingently redeemable convertible preferred shares		(26,391	)		(24,094	)		—			—


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Net loss attributable to common share holders		(116,682	)		(90,291	)		(109,841	)		(15,776	)

Other comprehensive income (loss)
Foreign currency translation adjustments		(7,563	)		11,688			(2,037	)		(293	)

Total other comprehensive income (loss), net of tax		(7,563	)		11,688			(2,037	)		(293	)

Comprehensive loss		(97,854	)		(54,509	)		(111,878	)		(16,069	)

Condensed Statements of Cash Flows


	As of December 31,
	2017			2018			2019
	RMB			RMB			RMB			US$
Net cash (used in)/ provided by operating activities		(744	)		16,052			15,273			2,194
Net cash used in investing activities		(157,412	)		(535,995	)		(95,412	)		(13,705	)
Net cash provided by/ (used in) from financing activities		217,446			614,884			(33,845	)		(4,862	)
Effect of exchange rate changes		(7,695	)		24,866			(9,763	)		(1,403	)

Net increase/ (decrease) in cash and cash equivalents		51,595			119,807			(123,747	)		(17,776	)

Cash and cash equivalents at the beginning of year		66,834			118,429			238,236			34,221

Cash and cash equivalents at the end of year		118,429			238,236			114,489			16,445

Organization and Principal Activities - Summary of Assets and Liabilities of VIE (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 CNY (¥)
Current assets:
Cash and cash equivalents	$ 61,975	¥ 431,459	$ 82,818	¥ 576,562	¥ 208,161	¥ 103,168
Restricted cash	17	115		115
Accounts receivable	19,452	135,417		141,911
Amounts due from related parities	75	521		4,564
Total current assets	93,885	653,599		803,730
Non-current assets:
Property and equipment, net	15,260	106,235		92,874
Intangible assets, net	1,265	8,810		1,531
Long-term investments	24,223	168,637		79,696
Other non-current assets	378	2,642		14,237
Total non-current assets	41,126	286,324		188,338
Total assets	135,011	939,923		992,068
Current liabilities:
Accounts payable	2,872	19,996		18,811
Deferred revenue and customer deposits	5,694	39,638		33,067
Accrued liabilities and other current liabilities	13,829	96,277		76,666
Amounts due to related parties	8	56		8,864
Total current liabilities	27,850	193,890		163,824
Non-current liabilities:
Other non-current liabilities	9	64		140
Total non-current liabilities	34,222	238,245		226,584
Total liabilities	62,072	432,135		390,408
VIE
Current assets:
Cash and cash equivalents	30,353	211,314		31,763
Restricted cash	17	115		115
Accounts receivable	19,210	133,745		141,705
Prepayments and other current assets	10,599	73,789		64,532
Amounts due from the Company and its subsidiaries	7,420	51,656		3,965
Amounts due from related parities	75	521		2,848
Total current assets	67,674	471,140		244,928
Non-current assets:
Property and equipment, net	8,244	57,390		46,271
Intangible assets, net	1,254	8,728		1,406
Long-term investments	15,572	108,408		71,512
Other non-current assets	277	1,925		13,529
Total non-current assets	25,347	176,451		132,718
Total assets	93,021	647,591		377,646
Current liabilities:
Accounts payable	2,869	19,974		18,683
Deferred revenue and customer deposits	10,604	73,820		55,625
Accrued liabilities and other current liabilities	10,425	72,580		59,556
Amounts due to the Company and its subsidiaries	26,611	185,263		15,534
Amounts due to related parties	8	56		8,864
Total current liabilities	50,517	351,693		158,262
Non-current liabilities:
Amounts due to the Company and its subsidiaries	54,153	377,000		240,000
Other non-current liabilities	9	64		140
Total non-current liabilities	54,162	377,064		240,140
Total liabilities	$ 104,679	¥ 728,757		¥ 398,402

Organization and Principal Activities - Summary of Results of Operations and Cash Flows of VIE (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Variable Interest Entity [Line Items]
Cost of revenues	$ (93,309)	¥ (649,596)	¥ (517,074)	¥ (213,370)
Net income/(loss)	(15,776)	(109,841)	(66,197)	(90,291)
Net cash (used in)/provided by operating activities	(3,699)	(25,758)	(97,925)	(75,532)
Net cash used in investing activities	(12,779)	(88,966)	(139,206)	(28,644)
Net cash provided by financing activities	(4,867)	(33,883)	614,884	217,446
VIE
Variable Interest Entity [Line Items]
Revenues	129,342	900,454	709,594	284,348
Cost of revenues	(90,222)	(628,109)	(499,589)	(206,789)
Net income/(loss)	(13,765)	(95,829)	(16,785)	(40,003)
Net cash (used in)/provided by operating activities	2,307	16,059	(68,316)	(51,016)
Net cash used in investing activities	(4,949)	(34,451)	(104,675)	¥ (10,000)
Net cash provided by financing activities	$ 28,433	¥ 197,943	¥ 154,901

- Definition

Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
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-Topic 260
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-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References + Details

Organization and Principal Activities - Additional Information (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
VIE
Variable Interest Entity [Line Items]
Net liabilities	$ 11,658	¥ 81,166	¥ 20,756

Summary of Significant Accounting Policies - Additional Information (Details)		12 Months Ended
	Mar. 01, 2017 shares	Dec. 31, 2019 USD ($) Supplier Segment ¥ / $ shares	Dec. 31, 2019 CNY (¥) Supplier Segment shares	Dec. 31, 2018 CNY (¥) Supplier	Dec. 31, 2017 CNY (¥) Supplier	Dec. 31, 2019 CNY (¥) ¥ / $	Nov. 20, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Foreign currency exchange rate \| ¥ / $		6.9618				6.9618
Derivative assets						¥ 0
Finite lived intangible asset residual value						0
Unrealized gain loss on equity investments		$ 2,485,000	¥ 17,298,000
Cumulative effect of adoption of ASC 606 (Note 2)			4,605,000
Revenue Recognized		3,484,000	24,256,000
Unsatisfied performance obligation		$ 3,093,000				21,534,000
Impairment of long-lived assets other than goodwill			¥ 0	¥ 0	¥ 0
Value added tax percentage		6.00%	6.00%
Share split, ratio		0.1	0.1
Share split, description		1 for 10 share split	1 for 10 share split
Share repurchased cash consideration			¥ 37,559,000	3,165,000
Research and development cost, capitalized			0
Advertising expenses		$ 2,847,000	¥ 17,311,000	6,697,000	5,277,000
Profit sharing program, recognized period		5 years	5 years
Capital leases						0
Employee defined contribution plan expense incurred		$ 2,977,000	¥ 20,724,000	17,097,000	12,121,000
Concentration risk, percentage		57.70%	57.70%
Appreciation of the US$ against RMB, percent		1.87%	1.87%
Number of reportable segment \| Segment		1	1
Revenues		$ 130,205,000	¥ 906,458,000	¥ 714,141,000	¥ 284,709,000
short-term investments						0
Product Concentration Risk \| Suppliers
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage		50.00%	50.00%	50.90%	81.30%
Advertising
Summary Of Significant Accounting Policies [Line Items]
Number of suppliers \| Supplier		3	3	3	3
CHINA
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents, restricted cash and short-term investments		$ 43,414,000		¥ 331,374,000		302,236,000
Outside China
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents, restricted cash and short-term investments		129,338,000		¥ 35,678,000		¥ 18,578,000
Maximum
Summary Of Significant Accounting Policies [Line Items]
Revenues \| $		$ 1,070,000,000
American Depositary Shares
Summary Of Significant Accounting Policies [Line Items]
Share repurchased under repurchase plan \| shares		920,606	920,606
Share repurchased cash consideration \| $		$ 5,910,000
American Depositary Shares \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Share repurchase plan, authorized amount \| $							$ 10,000,000
Class A Common Shares
Summary Of Significant Accounting Policies [Line Items]
Share repurchased under repurchase plan \| shares	613,737	613,737	613,737
Impact on Adoption of New Revenue Guidance
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect of adoption of ASC 606 (Note 2)			¥ 4,605,000
Revenues		$ 448,000	¥ 3,119,000

Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Leasehold Improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	over the shorter of lease terms or estimated useful lives of the assets
Minimum \| Computer Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Minimum \| Furniture and Fixtures
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Maximum \| Computer Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Maximum \| Furniture and Fixtures
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives	5 years

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References + Details

Summary of Significant Accounting Policies - Schedule of Finite Lived Intangible Assets Estimated Economic Lives (Details)	12 Months Ended
	Dec. 31, 2019
Minimum
Summary Of Significant Accounting Policies [Line Items]
Computer software, systems and acquired technology	1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Computer software, systems and acquired technology	5 years

Summary of Significant Accounting Policies - Schedule of Effect of Adoption of ASC 606 on Revenue (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2019 CNY (¥) ¥ / shares	Dec. 31, 2018 CNY (¥) ¥ / shares	Dec. 31, 2017 CNY (¥) ¥ / shares	Dec. 31, 2019 CNY (¥)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 130,205	¥ 906,458	¥ 714,141	¥ 284,709
Cost of revenues	(93,309)	(649,596)	(517,074)	(213,370)
Net loss	(15,776)	¥ (109,841)	(66,197)	¥ (90,291)
Common shares - basic and diluted				¥ (2.73)
Accounts receivable, net of allowance for doubtful accounts	19,452		141,911		¥ 135,417
Prepayments and other current assets	12,366		80,578		86,087
Deferred revenue and customer deposits	11,141		59,483		77,561
Accrued liabilities and other current liabilities	13,829		76,666		96,277
Accumulated deficit	(65,121)		(348,123)		(453,359)
Accumulated other comprehensive income	$ 914		¥ 8,400		6,363
Class A Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)
Class B Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)
Balances under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 129,757	¥ 903,339
Cost of revenues	(93,293)	(649,487)
Net loss	(16,208)	¥ (112,851)
Accounts receivable, net of allowance for doubtful accounts	18,830		¥ 143,543		131,088
Prepayments and other current assets	12,281		80,948		85,494
Deferred revenue and customer deposits	(11,643)		56,419		(81,053)
Accrued liabilities and other current liabilities	(13,737)		77,126		(95,635)
Accumulated deficit	(66,215)		(343,518)		(460,974)
Accumulated other comprehensive income	$ 891				6,206
Balances under ASC 605 \| Class A Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.47)
Balances under ASC 605 \| Class B Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted \| (per share)	$ (0.21)	¥ (1.47)
Effect of change higher/(lower)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 448	¥ 3,119
Cost of revenues	(16)	(109)
Net loss	432	¥ 3,010
Accounts receivable, net of allowance for doubtful accounts	622		1,632		4,329
Prepayments and other current assets	85		370		593
Deferred revenue and customer deposits	(502)		(3,064)		(3,492)
Accrued liabilities and other current liabilities	92		460		642
Accumulated deficit	1,094		¥ 4,605		7,615
Accumulated other comprehensive income	$ 23				¥ 157
Effect of change higher/(lower) \| Class A Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted		¥ 0.04
Effect of change higher/(lower) \| Class B Common Shares
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Common shares - basic and diluted		¥ 0.04

Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Jan. 01, 2019 CNY (¥)
Contract with Customer, Asset and Liability [Abstract]
Contract liabilities	$ 5,694	¥ 39,638	¥ 33,067

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References + Details

Accounts Receivable, Net - Schedule of Accounts Receivable (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Receivables [Abstract]
Accounts receivable	$ 23,548	¥ 163,933	¥ 151,219
Less: allowance for doubtful accounts	(4,096)	(28,516)	(9,308)
Total accounts receivable, net	$ 19,452	¥ 135,417	¥ 141,911

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4531-111522

+ Details

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References + Details

Accounts Receivable, Net - Schedule of Movement in Allowance for Doubtful Accounts (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Receivables [Abstract]
Beginning balance	$ 1,337	¥ 9,308	¥ 3,462
Provisions	2,881	20,054	6,389
Write-offs	(122)	(846)	(543)
Ending balance	$ 4,096	¥ 28,516	¥ 9,308

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References + Details

Prepayments and other current assets - Schedule of Prepayment and Other Current Assets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid media cost	$ 6,529	¥ 45,452	¥ 54,937
Prepaid service fee	1,421	9,892	6,804
VAT and other surcharges	2,336	16,266	12,097
Investment in a convertible loan	1,149	8,000
Office rental deposit	333	2,321	853
Others	598	4,156	5,887
Total prepayments and other current assets	$ 12,366	¥ 86,087	¥ 80,578

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References + Details

- Definition

Amount of asset related to consideration paid in advance for income and other taxes that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References + Details

Property and Equipment, Net - Schedule of Property and Equipment (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Property Plant And Equipment [Line Items]
Less: Accumulated depreciation	$ (8,660)	¥ (60,289)	¥ (30,576)
Total property and equipment, net	15,260	106,235	92,874
Office Furniture and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	859	5,982	4,920
Computer Equipment and Servers
Property Plant And Equipment [Line Items]
Property and equipment, gross	21,539	149,947	111,274
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,522	¥ 10,595	¥ 7,256

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References + Details

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References + Details

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References + Details

Property and Equipment, Net - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Property, Plant and Equipment [Abstract]
Property plant and equipment, impairment charges		¥ 0	¥ 0	¥ 0
Depreciation of property and equipment	$ 4,318	¥ 30,059,000	¥ 18,084,000	¥ 8,805,000

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References + Details

Intangible Assets - Schedule of Intangible Assets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Goodwill and Intangible Assets Disclosure [Abstract]
Computer software, systems and acquired technology	$ 1,646	¥ 11,460	¥ 1,874
Less: Accumulated amortization	(381)	(2,650)	(343)
Total intangible assets, net	$ 1,265	¥ 8,810	¥ 1,531

Intangible Assets - Additional Infomation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Impairment charges		¥ 0	¥ 0	¥ 0
Amortization of intangible assets	$ 331	2,307,000	307,000	¥ 35,000
Intangible assets with an indefinite useful life		¥ 0	¥ 0
Computer software and systems
Weighted average useful life of intangible assets	4 years 2 months 12 days	4 years 2 months 12 days	2 years 7 months 6 days	3 years
Computer software and systems \| MLINK
Intangible asset generated from acquisition		¥ 8,000,000
Weighted average useful life of intangible assets	5 years	5 years

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References + Details

- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References + Details

Intangible Assets - Schedule of Estimated Amortization Expense Related to the Existing Intangible Assets (Details) - Dec. 31, 2019 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Goodwill and Intangible Assets Disclosure [Abstract]
For the year ending December 31, 2020	$ 424	¥ 2,952
2021	317	2,207
2022	256	1,784
2023	230	1,600
2024	$ 38	¥ 267

Long-Term Investments - Schedule of Other Income Net (Details) - 12 months ended Dec. 31, 2019 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Investments, Debt and Equity Securities [Abstract]
Gross unrealized gain (upward adjustment)	$ 2,485	¥ 17,298
Gross unrealized loss (downward adjustment)	0	0
Net unrealized gain on equity investments held	2,485	17,298
Net realized gain on equity investments sold	974	6,778
Total net gains recognized in other income, net	$ 3,459	¥ 24,076

Long-Term Investments - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Schedule Of Investments [Line Items]
Cost Method Investments	$ 24,223				¥ 168,637
Cost Method Investments, Fair Value Disclosure	437				3,043
Cost-method Investments, Other than Temporary Impairment \| $	0		$ 0	$ 0
Cost method investments						¥ 79,696
Fair Value, Nonrecurring
Schedule Of Investments [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount	$ 4,507				¥ 31,375
Zhuoxuan
Schedule Of Investments [Line Items]
Percentage of share acquired	5.93%		5.93%		5.93%	5.93%
Cost method investments	$ 1,043		$ 1,043		¥ 7,265	¥ 7,265
Shuwei
Schedule Of Investments [Line Items]
Percentage of share acquired	2.89%		4.27%		2.89%	4.27%	6.25%
Proceeds from sale of an equity investment sold	$ 1,436	¥ 10,000
Realized gain (loss) on disposal of equity investment securities with out readily determinable fair value	974	6,778
Unrealized gain (loss) on disposal of equity investment securities with out readily determinable fair value	$ 2,048	¥ 14,255
Cost method investments							¥ 10,000

Deferred Revenue and Customer Deposits (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Revenue Recognition and Deferred Revenue [Abstract]
Deferred revenue	$ 5,694	¥ 39,638		¥ 33,067
Customer deposits	5,447	37,923	$ 3,794	26,416	¥ 20,636
Total deferred revenue and customer deposits — current	11,141	77,561		59,483
Deferred revenue — non-current	$ 1,171	¥ 8,150		¥ 10,265

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References + Details

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

+ References + Details

Deferred Revenue and Customer Deposits - Roll Forward of Customer Deposits (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Revenue Recognition and Deferred Revenue [Abstract]
Balance at beginning of year	$ 3,794	¥ 26,416	¥ 20,636
Cash received from customers during the year	60,229	419,303	407,630
Revenue recognized during the year	(57,447)	(399,933)	(397,488)
Refunds paid during the year	(1,129)	(7,863)	(4,362)
Balance at end of year	$ 5,447	¥ 37,923	¥ 26,416

Accrued Liabilities and Other Current Liabilities - Schedule of Accrued Liabilities and Other Current Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Payables and Accruals [Abstract]
Accrued payroll and welfare payables	$ 7,973	¥ 55,507	¥ 51,607
Other taxes and surcharge	2,351	16,368	11,277
Service fees	852	5,934	11,130
Acquisition of property and equipment	625	4,351	104
Government grant	334	2,326	0
Rental and property management fee	304	2,115	909
Others	1,390	9,676	1,639
Total accrued liabilities and other current liabilities	$ 13,829	¥ 96,277	¥ 76,666

- Definition

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

+ References + Details

Contingently Redeemable Convertible Preferred Shares - Additional information (Details) $ / shares in Units, $ in Thousands								12 Months Ended
	Apr. 11, 2018 USD ($) shares	Oct. 05, 2017 USD ($) $ / shares shares	Oct. 31, 2016 USD ($) $ / shares shares	Apr. 01, 2016 USD ($) $ / shares shares	May 13, 2015 USD ($) $ / shares shares	Jan. 21, 2015 USD ($) $ / shares shares	Nov. 18, 2014 USD ($) $ / shares shares	Dec. 31, 2019 $ / shares	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 CNY (¥)
Temporary Equity [Line Items]
Preferred shares dividends declared \| $ / shares								$ 0
Common shares issued upon the conversion of the preferred shares								50.00%
Preferred shares to common shares, conversion date								Jul. 26, 2018
Maximum
Temporary Equity [Line Items]
Equity classified preferred shares modification percentage								10.00%
Minimum
Temporary Equity [Line Items]
Equity classified preferred shares modification percentage								10.00%
Series C Preferred Share Agreement
Temporary Equity [Line Items]
Performance ratchet description								Performance Ratchet” whereby if the Company’s PRC GAAP audited revenue was less than (i) RMB80,000 in 2016, or (ii) RMB120,000 in 2017, Weidong Luo and the Company shall compensate the Series C investors in accordance to the specified formula
Audited revenue required for compensation to investors \| ¥									¥ 120,000	¥ 80,000
Liquidation Preference
Temporary Equity [Line Items]
Acquisition voting power								50.00%
Mandra iBase Limited
Temporary Equity [Line Items]
Common shares issued upon the conversion of the preferred shares								20.00%
Series A-1 Preferred Shares
Temporary Equity [Line Items]
Shares issued per share \| $ / shares							$ 0.36
Total consideration \| $							$ 2,000
Series A-1 Preferred Shares \| IDG-Accel China Growth Fund III L.P
Temporary Equity [Line Items]
Shares issued							5,187,780
Series A-1 Preferred Shares \| IDG-Accel China III Investors L.P
Temporary Equity [Line Items]
Shares issued							367,780
Series A-2 Preferred Shares
Temporary Equity [Line Items]
Shares issued per share \| $ / shares						$ 0.36
Total consideration \| $						$ 2,000
Series A-2 Preferred Shares \| IDG-Accel China Growth Fund III L.P
Temporary Equity [Line Items]
Shares issued						2,593,890
Series A-2 Preferred Shares \| IDG-Accel China III Investors L.P
Temporary Equity [Line Items]
Shares issued						183,890
Series A-2 Preferred Shares \| Elite Bright International Limited
Temporary Equity [Line Items]
Shares issued						1,388,890
Series A-2 Preferred Shares \| Mandra iBase Limited
Temporary Equity [Line Items]
Shares issued						1,388,890
Series B Preferred Share
Temporary Equity [Line Items]
Shares issued per share \| $ / shares					$ 0.95
Total consideration \| $					$ 7,500
Series B Preferred Share \| IDG-Accel China Growth Fund III L.P
Temporary Equity [Line Items]
Shares issued					494,070
Series B Preferred Share \| IDG-Accel China III Investors L.P
Temporary Equity [Line Items]
Shares issued					35,030
Series B Preferred Share \| Elite Bright International Limited
Temporary Equity [Line Items]
Shares issued					529,100
Series B Preferred Share \| Mandra iBase Limited
Temporary Equity [Line Items]
Shares issued					529,100
Series B Preferred Share \| Greatest Investments Limited
Temporary Equity [Line Items]
Shares issued					6,349,210
Series C-1 Preferred Shares
Temporary Equity [Line Items]
Shares issued per share \| $ / shares				$ 4.73
Total consideration \| $				$ 11,111
Series C-1 Preferred Shares \| Greatest Investments Limited
Temporary Equity [Line Items]
Shares issued				235,160
Series C-1 Preferred Shares \| Shenzhen Guohai Chuangxin Investment Management Limited Corporation
Temporary Equity [Line Items]
Shares issued				2,116,400
Series C Two Contingent Redeemable Convertible Preferred Shares
Temporary Equity [Line Items]
Shares issued per share \| $ / shares			$ 4.73
Total consideration \| $			$ 12,000
Series C Two Contingent Redeemable Convertible Preferred Shares \| Mandra iBase Limited
Temporary Equity [Line Items]
Shares issued			634,920
Series C Two Contingent Redeemable Convertible Preferred Shares \| T.C.L. Industries Holdings (H.K.) Ltd
Temporary Equity [Line Items]
Redemption of preferred shares	1,738,720
Redemption of preferred shares, value \| $	$ 9,049
Shares issued			1,693,120
Series C Two Contingent Redeemable Convertible Preferred Shares \| Genesis Ventures Limited
Temporary Equity [Line Items]
Shares issued			211,640
Series D Preferred Shares
Temporary Equity [Line Items]
Shares issued per share \| $ / shares		$ 5.40
Total consideration \| $		$ 30,000
Liquidation preference as percentage of issue price								115.00%
Liquidation preference								The holders of Series D preferred shares are entitled to receive an amount equal to 115% of the Series D Issue Price, plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series C, B and A preferred shares and the common shareholders of the Company.
Series D Preferred Shares \| Fidelity Investment Funds
Temporary Equity [Line Items]
Shares issued		28,062
Series D Preferred Shares \| Fidelity China Special Situations PLC
Temporary Equity [Line Items]
Shares issued		2,441,572
Series D Preferred Shares \| Fidelity Funds
Temporary Equity [Line Items]
Shares issued		3,089,853
Series C Preferred Shares
Temporary Equity [Line Items]
Liquidation preference as percentage of issue price								100.00%
Liquidation preference								plus an annual simple return of 10% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series B and A preferred shares
Series C Preferred Shares \| Liquidation Preference
Temporary Equity [Line Items]
Preferred stock annual simple return percentage								10.00%
Series B Preferred Shares
Temporary Equity [Line Items]
Liquidation preference as percentage of issue price								125.00%
Series B Preferred Shares \| Liquidation Preference
Temporary Equity [Line Items]
Preferred stock annual compound return percentage								6.00%
Series A Preferred Shares
Temporary Equity [Line Items]
Liquidation preference as percentage of issue price								150.00%
Liquidation preference								After the payment to the holders of Series C preferred shares, the holders of Series B preferred shares are entitled to receive an amount equal to 125% of the Series B Issue Price, plus an annual compounded return of 6% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the Series A preferred shares and the common shareholders of the Company.
Series A Preferred Shares \| Liquidation Preference
Temporary Equity [Line Items]
Liquidation preference								After the payment to the holders of Series B preferred shares, the holders of Series A preferred shares are entitled to receive an amount equal to 150% of the Series A Issue Price, plus an annual compounded return of 8% accrued thereon and plus all declared but unpaid dividend, in preference to any distribution to the holders of the common shareholders of the Company.
Preferred stock annual compound return percentage								8.00%
Redeemable Convertible Preferred Shares
Temporary Equity [Line Items]
Preferred stock initial conversion ratio								100.00%

Contingently Redeemable Convertible Preferred Shares - Schedule of Movement in Carrying Value of Convertible Preferred Shares (Details) ¥ in Thousands	12 Months Ended
	Dec. 31, 2018 CNY (¥)
Class Of Stock [Line Items]
Beginning balance	¥ 466,637
Accretion of Preferred Shares	24,094
Redemption of Preferred Shares	(57,234)
Concertion to Common Shares	(433,497)
Series A
Class Of Stock [Line Items]
Beginning balance	26,979
Accretion of Preferred Shares	1,463
Concertion to Common Shares	(28,442)
Series B
Class Of Stock [Line Items]
Beginning balance	52,723
Accretion of Preferred Shares	4,137
Concertion to Common Shares	(56,860)
Series C
Class Of Stock [Line Items]
Beginning balance	168,317
Accretion of Preferred Shares	7,441
Redemption of Preferred Shares	(57,234)
Concertion to Common Shares	(118,524)
Series D
Class Of Stock [Line Items]
Beginning balance	218,618
Accretion of Preferred Shares	11,053
Concertion to Common Shares	¥ (229,671)

Share-Based Compensation - Additional Information (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands			12 Months Ended
	Mar. 01, 2017 shares	Jul. 23, 2014 shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares	Dec. 31, 2018 CNY (¥) ¥ / shares	Dec. 31, 2017 CNY (¥) ¥ / shares	Dec. 31, 2019 CNY (¥) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of awards vested expenses recognized			$ 6,792	¥ 47,284	¥ 24,561	¥ 8,275
Share Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			7,662	53,338	0	0
Fair value of awards vested expenses recognized			6,792	¥ 47,284	¥ 24,561	¥ 8,275
Unrecognized share-based compensation expense			$ 4,748				¥ 33,056
Unrecognized share-based compensation expense estimated weighted-average period			2 years 7 months 9 days	2 years 7 months 9 days
Weighted average grant-date fair value per share, granted \| ¥ / shares				¥ 50.18	¥ 45.72	¥ 10.34
Restricted Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant-date fair value per share, granted \| (per share)			$ 6.48	¥ 45.09	¥ 54.69
Unrecognized share-based compensation cost			$ 9				¥ 64
2014 Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting period		4 years
Common shares reserved for issuance		5,500,000
Share available for grant			1,911				1,911
2014 Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expiration period		10 years
2017 Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting period	4 years
Common shares reserved for issuance	6,015,137
Share available for grant			3,174,379				3,174,379
2017 Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expiration period	10 years
2014 and 2017 Plans
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expiration period					10 years
2014 and 2017 Plans \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting period					4 years
2014 and 2017 Plans \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting period					1 year

Share-Based Compensation - Summary of Share Option Activity (Details) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Options, Outstanding, Beginning Balance	8,032,458
Number of Options, Granted	333,077
Number of Options, Forfeited	72,891
Number of Options, Exercised	1,113,098
Number of Options, Outstanding, Ending Balance	7,179,546	8,032,458
Number of Options, Vested and expected to vest	7,179,546
Number of Options, Exercisable	5,237,925
Weighted-Average Exercise Price, Outstanding, Beginning Balance	¥ 9.04
Weighted-Average Exercise Price, Granted	8.98
Weighted-Average Exercise Price, Forfeited	36.42
Weighted-Average Exercise Price, Exercised	2.74
Weighted-Average Exercise Price, Outstanding, Ending Balance	9.74	¥ 9.04
Weighted-Average Exercise Price, Vested and expected to vest	9.74
Weighted-Average Exercise Price, Exercisable	5.17
Weighted- Average grant-date Fair Value per Option, Outstanding, Beginning Balance	12.48
Weighted- Average grant-date Fair Value per Option, Granted	50.18
Weighted- Average grant-date Fair Value per Option, Forfeited	28.52
Weighted- Average grant-date Fair Value per Option, Exercised	4.06
Weighted- Average grant-date Fair Value per Option, Outstanding, Ending Balance	15.37	¥ 12.48
Weighted- Average grant-date Fair Value per Option, Vested and expected to vest	15.37
Weighted- Average grant-date Fair Value per Option, Exercisable	¥ 7.90
Weighted Average Remaining Contractual Term (Years), Outstanding	6 years 9 months	7 years 5 months 19 days
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest	6 years 9 months
Weighted Average Remaining Contractual Term (Years), Exercisable	6 years 2 months 15 days
Aggregate Intrinsic Value, Outstanding	¥ 163,589	¥ 507,876
Aggregate Intrinsic Value, Vested and expected to vest	163,589
Aggregate Intrinsic Value, Exercisable	¥ 137,787

Share-Based Compensation - Schedule of Assumptions Used to Estimate Fair Values of Share Options Granted (Details) - ¥ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate, minimum	1.65%	2.27%	2.27%
Risk-free interest rate, maximum	2.54%	2.93%	2.41%
Dividend yield	0.00%	0.00%	0.00%
Expected volatility, minimum	44.23%	45.30%	46.33%
Expected volatility, maximum	44.71%	46.10%	47.15%
Weighted average expected volatility	44.53%	45.98%	46.66%
Expected exercise multiple	¥ 2.5	¥ 2.5	¥ 2.5

Share-Based Compensation - Summary of Restricted Share Units (Details) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate Intrinsic Value, Granted
Restricted Share Units \| Employees and Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Share Units, Outstanding, December 31, 2018	12,550
Number of Share Units, Granted	33,643
Number of Share Units, Exercised	12,550
Number of Share Units, Outstanding, December 31, 2019	33,643	12,550
Number of Share Units, Vested and expected to vest at December 31, 2019	33,643
Weighted-Average grant-date Fair Value per Option, Outstanding, December 31, 2018	¥ 54.69
Weighted-Average grant-date Fair Value per Option, Granted	45.09
Weighted-Average grant-date Fair Value per Option, Exercised	54.97
Weighted-Average grant-date Fair Value per Option, Outstanding, December 31, 2019	44.98	¥ 54.69
Weighted-Average grant-date Fair Value per Option, Vested and expected to vest at December 31, 2019	¥ 44.98
Weighted Average Remaining Contractual Term (Years), Outstanding, December 31, 2019	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest at December 31, 2019	9 years 8 months 12 days	9 years 8 months 4 days
Aggregate Intrinsic Value, Outstanding, December 31, 2018	¥ 907
Aggregate Intrinsic Value, Outstanding, December 31, 2019	1,039	¥ 907
Aggregate Intrinsic Value, Vested and expected to vest at December 31, 2019	¥ 1,039

Share-Based Compensation - Summary of Total Compensation Costs Recognized (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total	$ 6,792	¥ 47,284	¥ 24,561	¥ 8,275
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total	10	73
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total	1,841	12,819	9,448	1,408
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total	868	6,040	3,347	944
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total	$ 4,073	¥ 28,352	¥ 11,766	¥ 5,923

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References + Details

Income Taxes - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)
Income Tax Disclosure [Line Items]
Deferred tax assets related to net operating loss carry forwards		¥ 78,985		$ 15,528	¥ 108,101
Dividend withholding tax	¥ 0	0
Undistributed earnings	0	0
Interest and penalties related to an uncertain tax position	¥ 0	¥ 0
Income tax examination, description	In general, the PRC tax authorities have up to five years to conduct examinations of the tax filings of the Company’s PRC subsidiary and the VIE. Accordingly, the PRC tax filings from 2014 through 2019 remain open to examination by the respective tax authorities
Minimum
Income Tax Disclosure [Line Items]
Open tax examination year	2014
Maximum
Income Tax Disclosure [Line Items]
Open tax examination year	2019
VIE \| Minimum
Income Tax Disclosure [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2020
VIE \| Maximum
Income Tax Disclosure [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2029
WFOE \| Minimum
Income Tax Disclosure [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2020
WFOE \| Maximum
Income Tax Disclosure [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2024
Hong Kong
Income Tax Disclosure [Line Items]
Effective profits tax rate	16.50%
PRC
Income Tax Disclosure [Line Items]
Effective statutory enterprise income tax rate	25.00%	25.00%	25.00%
Effective preferential income tax rate	15.00%
PRC \| VIE
Income Tax Disclosure [Line Items]
Effective preferential income tax rate	15.00%	15.00%	15.00%
PRC \| WFOE
Income Tax Disclosure [Line Items]
Effective statutory enterprise income tax rate	25.00%

Income Taxes - Summary of Profit / (Loss) Before Income Taxes (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Income Tax Disclosure [Line Items]
Total loss before income taxes	$ (15,753)	¥ (109,679)	¥ (66,167)	¥ (94,271)
Cayman Islands
Income Tax Disclosure [Line Items]
Total loss before income taxes	(2,401)	(16,716)	6,622	(10,584)
British Virgin Islands
Income Tax Disclosure [Line Items]
Total loss before income taxes	(4)	(30)	(25)	(2)
Hong Kong
Income Tax Disclosure [Line Items]
Total loss before income taxes	(445)	(3,097)	208	(34)
China
Income Tax Disclosure [Line Items]
Total loss before income taxes	$ (12,903)	¥ (89,836)	¥ (72,972)	¥ (83,651)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

+ Details

Income Taxes - Summary of Composition of Income Tax Expense (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Income Tax Disclosure [Abstract]
Current income tax expense	$ (23)	¥ (162)	¥ (35)
Deferred tax benefit			5	¥ 3,980
Total income tax (expense)/benefit	$ (23)	¥ (162)	¥ (30)	¥ 3,980

- Definition

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

+ References + Details

- Definition

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References + Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes - Summary of Reconciliation Between Expenses of Income Taxes (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Income Tax Disclosure [Abstract]
Total loss before income taxes	$ (15,753)	¥ (109,679)	¥ (66,167)	¥ (94,271)
Income tax expense computed at PRC statutory rate	(3,939)	(27,421)	(16,542)
International tax rate differential	639	4,451	(1,668)
Preferential tax rate	1,845	12,845	6,397
Deferred tax items tax rate differential	(1,459)	(10,157)	(6,390)
Research and development super-deduction	(3,865)	(26,910)	(21,559)
Non-deductible expenses	1,809	12,587	5,701
Deferred tax expense			4,073
Recognition of prior year tax loss	(279)	(1,939)
Changes in valuation allowance	5,272	36,706	30,018
Income tax expense	$ 23	¥ 162	¥ 30	¥ (3,980)

Income Taxes - Summary of Reconciliation Between Expenses of Income Taxes (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
PRC
Income Tax Disclosure [Line Items]
Effective statutory enterprise income tax rate	25.00%	25.00%	25.00%

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References + Details

Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Deferred tax assets, net
Provision for doubtful debts	$ 1,075	¥ 7,484	¥ 2,463
Accrued expense	1,367	9,516	3,737
Net operating loss carry forward	15,528	108,101	78,985
Government grant related to assets	52	359	54
Fixed assets depreciation	10	73	14
Estimated liabilities			10
Net unrealized gain on equity investments held	(512)	(3,564)
Valuation allowance	$ (17,520)	¥ (121,969)	¥ (85,263)

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from equity method investments.

+ References + Details

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References + Details

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

+ References + Details

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

+ References + Details

- Definition

Amount of valuation allowance of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent.

+ References + Details

Convertible Notes - Additional Information (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Apr. 17, 2018 USD ($) $ / shares
Convertible Notes [Line Item]
Aggregate principal amount	$ 35,000		¥ 244,167	¥ 240,212
Initial offering period	no qualified IPO were to occur within two years of the issue date, the outstanding obligation at their principal amount
Percentage of internal rate of return	8.00%
Simple interest on principal	15.00%		15.00%
Interest on internal rate of return per annum	15.00%
Derivative liability	$ 3,224
Change in fair value of current earnings		$ 3,224
Effective interest rate	4.69%		4.69%
BCF
Convertible Notes [Line Item]
Issuance price \| $ / shares	$ 11.76
Fair value per ordinary share \| $ / shares	$ 9.87
Zero Coupon Convertible Notes (the "Convertible Notes") Due 2021
Convertible Notes [Line Item]
Conversion price per share \| $ / shares					$ 11.76
Debt issuance costs	$ 1,275
Zero Coupon Convertible Notes (the "Convertible Notes") Due 2021 \| Existing Investor
Convertible Notes [Line Item]
Aggregate principal amount					$ 35,000

Convertible Notes - Summary of Principal Amount, Debt Issuance Costs and Derivative Liability (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 CNY (¥)
Convertible Notes [Line Item]
Principal amount		$ 35,000	¥ 244,167		¥ 240,212
Contingent redemption feature and debt issuance costs		(1,958)	(14,136)		(24,033)
Total		$ 33,042	230,031	$ 33,042	¥ 216,179
Charge to profit and loss	¥ 10,178
Foreign Currency Translation Adjustment
Convertible Notes [Line Item]
Principal amount			3,955
Contingent redemption feature and debt issuance costs			(281)
Total			¥ 3,674

Convertible Notes - Summary of Aggregate Future Principal Payments for the Convertible Notes (Details) - Dec. 31, 2019 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Debt Disclosure [Abstract]
1 year to 2 years (Including 2 years)	$ 35,000	¥ 244,167
Total	$ 35,000	¥ 244,167

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

Commitments and Contingencies - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2019 CNY (¥)
Commitments And Contingencies Disclosure [Line Items]
Operating lease, expenses	$ 2,353	¥ 16,380	¥ 12,120	¥ 6,081
Consulting Service for Lease Term within One Year
Commitments And Contingencies Disclosure [Line Items]
Future minimum payment under non-cancellable purchase commitment payment period			1 year
Future minimum payment under non-cancellable purchase commitment	495				¥ 3,449
Consulting Service for Lease Term within Two Year
Commitments And Contingencies Disclosure [Line Items]
Future minimum payment under non-cancellable purchase commitment payment period			2 years
Future minimum payment under non-cancellable purchase commitment	$ 41				¥ 285
Maximum [Member] \| Office Premise [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Lease term cf contract	5 years				5 years
Minimum [Member] \| Office Premise [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Lease term cf contract	6 months				6 months

Commitments and Contingencies - Schedule of Future Minimum Payments Under Non-Cancellable Operating Leases (Details) - Dec. 31, 2019 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Commitments and Contingencies Disclosure [Abstract]
2020	$ 1,439	¥ 10,018
2021	636	4,425
2022	593	4,131
2023	50	346
Total	$ 2,718	¥ 18,920

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

Share Capital - Additional Information (Details)				12 Months Ended
Share Capital - Additional Information (Details)	Jul. 26, 2018 shares	Apr. 11, 2018 USD ($) shares	Mar. 01, 2017 shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares	Nov. 20, 2018 USD ($)	Aug. 30, 2018 shares	Jun. 27, 2018 USD ($) shares	Dec. 31, 2017 shares
Share Capital [Line Items]
Common shares, value authorized \| $								$ 500,000
Common shares, shares authorized								5,000,000,000
Common shares, shares outstanding									42,666,670
Preferred stock, shares outstanding	27,867,937								27,867,937
Share split, ratio				0.1
American Depositary Shares
Share Capital [Line Items]
Share repurchased under repurchase plan				920,606
American Depositary Shares \| Maximum
Share Capital [Line Items]
Share repurchase plan, authorized amount \| $						$ 10,000,000
IPO \| American Depositary Shares
Share Capital [Line Items]
Shares issued	9,060,000
Preferred Stock \| IPO
Share Capital [Line Items]
Share split, ratio	1
Common Stock
Share Capital [Line Items]
Shares issued					6,059,708
Share repurchased under repurchase plan				567,434	46,303
Common Stock \| IPO
Share Capital [Line Items]
Share split, ratio	1
Series C Contingently Redeemable Convertible Preferred Shares \| T.C.L. Industries Holdings (H.K.) Ltd
Share Capital [Line Items]
Redemption of preferred shares		1,738,720
Redemption of preferred shares, value \| $		$ 9,049,000,000
Class A Common Shares
Share Capital [Line Items]
Common shares, shares authorized				4,920,000,000	4,920,000,000
Common shares, shares outstanding				60,106,037	59,547,823
Common shares, shares issued				60,106,037	59,547,823
Share repurchased under repurchase plan			613,737	613,737
Class A Common Shares \| IPO
Share Capital [Line Items]
Preferred stock, shares issued upon conversion	27,867,937
Conversion of stock, shares issued	25,666,481
Class A Common Shares \| IPO \| American Depositary Shares
Share Capital [Line Items]
Shares issued	6,040,000
Class A Common Shares \| Over-Allotment Option
Share Capital [Line Items]
Common shares, shares issued							19,708
Class B Common Shares
Share Capital [Line Items]
Common shares, shares authorized				30,000,000	30,000,000
Common shares, shares outstanding				17,000,189	17,000,189
Common shares, shares issued				17,000,189	17,000,189
Class B Common Shares \| IPO
Share Capital [Line Items]
Conversion of stock, shares issued	17,000,189

Share Capital - Basic and Diluted Loss Per Share (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares	Dec. 31, 2018 CNY (¥) ¥ / shares shares	Dec. 31, 2017 CNY (¥) ¥ / shares shares
Numerator:
Net loss attributable to Aurora Mobile Limited's shareholders	$ (15,776)	¥ (109,841)	¥ (66,197)	¥ (90,291)
Deduct: Accretion of contingently redeemable convertible preferred shares \| ¥			(24,094)	(26,391)
Net loss attributable to common shareholders	(15,776)	(109,841)	(90,291)	¥ (116,682)
Denominator:
Weighted average number of shares used in calculating basic and diluted loss per share \| shares				42,666,670
Basic and diluted loss per share \| ¥ / shares				¥ (2.73)
Class A Common Shares
Numerator:
Net loss attributable to Aurora Mobile Limited's shareholders	(12,282)	(85,502)	(46,606)
Deduct: Accretion of contingently redeemable convertible preferred shares \| ¥			(16,963)
Net loss attributable to common shareholders	$ (12,282)	¥ (85,502)	¥ (63,569)
Denominator:
Weighted average number of shares used in calculating basic and diluted loss per share \| shares	59,721,341	59,721,341	40,441,999
Basic and diluted loss per share \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)
Class B Common Shares
Numerator:
Net loss attributable to Aurora Mobile Limited's shareholders	$ (3,496)	¥ (24,339)	¥ (19,591)
Deduct: Accretion of contingently redeemable convertible preferred shares \| ¥			(7,131)
Net loss attributable to common shareholders	$ (3,496)	¥ (24,339)	¥ (26,722)
Denominator:
Weighted average number of shares used in calculating basic and diluted loss per share \| shares	17,000,189	17,000,189	17,000,189
Basic and diluted loss per share \| (per share)	$ (0.21)	¥ (1.43)	¥ (1.57)

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Related Party Transactions - Schedule of Amount Due From Related Party (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Related Party Transaction [Line Items]
Total amounts due from related parties	$ 75	¥ 521	¥ 4,564
Shenzhen Weixunyitong Information Technology Co Ltd
Related Party Transaction [Line Items]
Total amounts due from related parties	$ 75	¥ 521	1,543
Guangzhou Tianlang Network Technology Co Ltd
Related Party Transaction [Line Items]
Total amounts due from related parties			1,305
Fei Chen
Related Party Transaction [Line Items]
Total amounts due from related parties			¥ 1,716

- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(11))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Related Party Transactions - Schedule of Amount Due to Related Party (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Related Party Transaction [Line Items]
Amount due to related parties	$ 8	¥ 56	¥ 8,864
Shenzhen Weixunyitong Information Technology Co Ltd
Related Party Transaction [Line Items]
Amount due to related parties	$ 8	¥ 56	¥ 8,864

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

Related Party Transactions - Schedule of Transactions With Related Parties (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2019 CNY (¥)
Related Party Transaction [Line Items]
Services provided to related party	$ 38		¥ 2,544	¥ 3,507	¥ 266
Total	1,666	¥ 11,600	21,384	2,229
Shenzhen Weixunyitong Information Technology Co Ltd
Related Party Transaction [Line Items]
Services provided to related party			1,002	2,752
Services received from related party	1,666		20,909	672	11,600
Office premises leased from related party			475	1,557
Guangzhou Tianlang Network Technology Co Ltd
Related Party Transaction [Line Items]
Services provided to related party	$ 38		¥ 1,542	¥ 755	¥ 266

Revenues - Schedule of Revenues (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Disaggregation Of Revenue [Line Items]
Total revenues	$ 130,205	¥ 906,458	¥ 714,141	¥ 284,709
Targeted Marketing
Disaggregation Of Revenue [Line Items]
Total revenues	100,001	696,190	572,796	221,153
Developer Services
Disaggregation Of Revenue [Line Items]
Total revenues	13,438	93,553	60,106	38,795
Other SaaS Products
Disaggregation Of Revenue [Line Items]
Total revenues	16,766	116,715	81,239	24,761
Total SaaS Products
Disaggregation Of Revenue [Line Items]
Total revenues	$ 30,204	¥ 210,268	¥ 141,345	¥ 63,556

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Revenues - Schedule Of Timing Of Revenue Recognition (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Disaggregation of Revenue [Line Items]
Total revenues	$ 130,205	¥ 906,458	¥ 714,141	¥ 284,709
Developer Services
Disaggregation of Revenue [Line Items]
Total revenues	13,438	93,553	60,106	38,795
Developer Services \| Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total revenues	3,526	24,549
Developer Services \| Transferred over Time
Disaggregation of Revenue [Line Items]
Total revenues	9,912	69,004
Other SaaS Products
Disaggregation of Revenue [Line Items]
Total revenues	16,766	116,715	¥ 81,239	¥ 24,761
Other SaaS Products \| Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total revenues	9,150	63,703
Other SaaS Products \| Transferred over Time
Disaggregation of Revenue [Line Items]
Total revenues	7,616	53,012
SaaS Products
Disaggregation of Revenue [Line Items]
Total revenues	$ 30,204	¥ 210,268

- Definition

+ References + Details

Other income - Schedule of Other Nonoperating Income by Component (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Other Income, Nonoperating [Abstract]
Government grants	$ 1,802	¥ 12,546	¥ 7,483	¥ 677
Gain on an equity investment sold	974	6,778
Unrealized gain on equity investments held	2,485	17,298
Income from ADR profit-sharing program	315	2,190	966
Total	$ 5,576	¥ 38,812	¥ 8,449	¥ 677

Fair Value Measurements - Summary of Assets And Liabilities Measured Or Disclosed At Fair Value (Details) - 12 months ended Dec. 31, 2019 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)	CNY (¥)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets and liabilities measured at fair value		$ 4,507	¥ 31,375
Fair value adjustment	¥ 17,298
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments accounted for at fair value using the alternative measurement		$ 4,507	31,375
Fair value adjustment	¥ 17,298
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets and liabilities measured at fair value			31,375
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments accounted for at fair value using the alternative measurement			¥ 31,375

- Definition

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

+ References + Details

Fair Value Measurements - Summary of Changes in Fair Value of Redemption Feature Derivative Liability (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Charge to profit and loss		¥ (10,178)
Ending balance \| $	$ 3,224
Recurring \| Significant unobservable inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance			¥ 20,237
Charge to profit and loss			(21,302)
Foreign currency translation adjustment			1,065
Ending balance

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Restricted Net Assets - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Dividends Payable [Line Items]
Threshold limit percentage of registered capital	50.00%
PRC \| VIE
Dividends Payable [Line Items]
Restricted net asset, using statutory accounting principles	$ 122,977	¥ 856,141	¥ 787,223
Minimum
Dividends Payable [Line Items]
Minimum percentage of net profit to be allocated to statutory reserve fund	10.00%

Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 CNY (¥)
Current assets:
Cash and cash equivalents	$ 61,975	¥ 431,459	$ 82,818	¥ 576,562	¥ 208,161	¥ 103,168
Prepayments and other current assets	12,366	86,087		80,578
Total current assets	93,885	653,599		803,730
Non-current assets:
Long-term investments	24,223	168,637		79,696
Intangible assets, net	1,265	8,810		1,531
Total non-current assets	41,126	286,324		188,338
Total assets	135,011	939,923		992,068
Current liabilities:
Total current liabilities	27,850	193,890		163,824
Non-current liabilities:
Deferred revenue — non-current	1,171	8,150		10,265
Convertible notes	33,042	230,031	$ 33,042	216,179
Total non-current liabilities	34,222	238,245		226,584
Total liabilities	62,072	432,135		390,408
Shareholders' equity
Treasury shares (46,303 and 81,930 class A common shares as of December 31, 2018 and 2019, respectively)	(287)	(1,999)		(3,165)
Additional paid-in capital	137,426	956,735		944,500
Accumulated deficit	(65,121)	(453,359)		(348,123)
Accumulated other comprehensive income	914	6,363		8,400
Total shareholders' equity	72,939	507,788		601,660	¥ (224,384)	¥ (108,414)
Total liabilities and shareholders' equity	135,011	939,923		992,068
Parent Company
Current assets:
Cash and cash equivalents	16,445	114,489		238,236
Prepayments and other current assets	1,034	7,198		7,030
Prepayments	364	2,528		4,245
Total current assets	17,843	124,215		249,511
Non-current assets:
Long-term investments	95,959	668,049		590,752
Intangible assets, net	9	62		93
Total non-current assets	95,968	668,111		590,845
Total assets	113,811	792,326		840,356
Current liabilities:
Accrued liabilities and other current liabilities	207	1,439		11,542
Amounts due to the Company and its subsidiaries	6,452	44,918		710
Total current liabilities	6,659	46,357		12,252
Non-current liabilities:
Deferred revenue — non-current	1,171	8,150		10,265
Convertible notes	33,042	230,031		216,179
Total non-current liabilities	34,213	238,181		226,444
Total liabilities	40,872	284,538		238,696
Shareholders' equity
Treasury shares (46,303 and 81,930 class A common shares as of December 31, 2018 and 2019, respectively)	(287)	(1,999)		(3,165)
Additional paid-in capital	137,426	956,735		944,500
Accumulated deficit	(65,121)	(453,359)		(348,123)
Accumulated other comprehensive income	914	6,363		8,400
Total shareholders' equity	72,939	507,788		601,660
Total liabilities and shareholders' equity	113,811	792,326		840,356
Class A Common Shares
Shareholders' equity
Common shares	5	37		37
Class A Common Shares \| Parent Company
Shareholders' equity
Common shares	5	37		37
Class B Common Shares
Shareholders' equity
Common shares	2	11		11
Class B Common Shares \| Parent Company
Shareholders' equity
Common shares	$ 2	¥ 11		¥ 11

Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Parenthetical) (Details) - $ / shares	Dec. 31, 2019	Dec. 31, 2018	Jun. 27, 2018	Dec. 31, 2017
Condensed Balance Sheet Statements Captions [Line Items]
Common shares, shares authorized			5,000,000,000
Common shares, shares outstanding				42,666,670
Class A Common Shares
Condensed Balance Sheet Statements Captions [Line Items]
Common shares, par value per share	$ 0.0001
Common shares, shares authorized	4,920,000,000	4,920,000,000
Common shares, shares issued	60,106,037	59,547,823
Common shares, shares outstanding	60,106,037	59,547,823
Treasury shares, shares	81,930	46,303
Class B Common Shares
Condensed Balance Sheet Statements Captions [Line Items]
Common shares, par value per share	$ 0.0001
Common shares, shares authorized	30,000,000	30,000,000
Common shares, shares issued	17,000,189	17,000,189
Common shares, shares outstanding	17,000,189	17,000,189
Parent Company
Condensed Balance Sheet Statements Captions [Line Items]
Treasury shares, shares	81,930	46,303
Parent Company \| Class A Common Shares
Condensed Balance Sheet Statements Captions [Line Items]
Common shares, par value per share	$ 0.0001	$ 0.0001
Common shares, shares authorized	4,920,000,000	4,920,000,000
Common shares, shares issued	60,106,037	59,547,823
Common shares, shares outstanding	60,106,037	59,547,823
Parent Company \| Class B Common Shares
Condensed Balance Sheet Statements Captions [Line Items]
Common shares, par value per share	$ 0.0001	$ 0.0001
Common shares, shares authorized	30,000,000	30,000,000
Common shares, shares issued	17,000,189	17,000,189
Common shares, shares outstanding	17,000,189	17,000,189

Condensed Financial Information of the Parent Company - Condensed Statements of Comprehensive Loss (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Operating expenses
General and administrative	$ (15,699)	¥ (109,291,000)	¥ (71,641,000)	¥ (32,431,000)
Total operating expenses	(58,043)	(404,087,000)	(289,852,000)	(163,755,000)
Loss from operations	(21,147)	(147,225,000)	(92,785,000)	(92,416,000)
Foreign exchange loss, net	249	1,731,000	(11,689,000)	(339,000)
Interest income	905	6,300,000	3,657,000	314,000
Interest expense	(1,597)	(11,118,000)	(7,054,000)	(122,000)
Change in fair value of derivative liability		(10,178,000)
Loss before income taxes	(15,753)	(109,679,000)	(66,167,000)	(94,271,000)
Income tax expenses	23	162,000	30,000	(3,980,000)
Net Loss	(15,776)	(109,841,000)	(66,197,000)	(90,291,000)
Deduct: Accretion of contingently redeemable convertible preferred shares			(24,094,000)	(26,391,000)
Net loss attributable to common shareholders	(15,776)	(109,841,000)	(90,291,000)	(116,682,000)
Other comprehensive income (loss)
Foreign currency translation adjustments	(293)	(2,037,000)	11,688,000	(7,563,000)
Comprehensive loss	(16,069)	(111,878,000)	(54,509,000)	(97,854,000)
Parent Company
Operating expenses
General and administrative	(2,067)	(14,389,000)	(11,941,000)	(10,076,000)
Share of losses of subsidiaries and VIE	(13,404)	(93,328,000)	(72,750,000)	(79,916,000)
Total operating expenses	(15,471)	(107,717,000)	(84,691)	(89,992,000)
Loss from operations	(15,471)	(107,717,000)	(84,691,000)	(89,992,000)
Foreign exchange loss, net			(186,000)	(339,000)
Interest income	396	2,754,000	3,013,000	18,000
Interest expense	(1,462)	(10,178,000)	(6,599,000)
Other income	761	5,300,000	964,000	22,000
Change in fair value of derivative liability			21,302,000
Loss before income taxes	(15,776)	(109,841,000)	(66,197,000)	(90,291,000)
Income tax expenses	0	0
Net Loss	(15,776)	(109,841,000)	(66,197,000)	(90,291,000)
Deduct: Accretion of contingently redeemable convertible preferred shares			(24,094,000)	(26,391,000)
Net loss attributable to common shareholders	(15,776)	(109,841,000)	(90,291,000)	(116,682,000)
Other comprehensive income (loss)
Foreign currency translation adjustments	(293)	(2,037,000)	11,688,000	(7,563,000)
Total other comprehensive income (loss), net of tax	(293)	(2,037,000)	11,688,000	(7,563,000)
Comprehensive loss	$ (16,069)	¥ (111,878,000)	¥ (54,509,000)	¥ (97,854,000)

Condensed Financial Information of the Parent Company - Condensed Statements of Cash Flows (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Condensed Cash Flow Statements Captions [Line Items]
Net cash (used in)/ provided by operating activities	$ (3,699)	¥ (25,758)	¥ (97,925)	¥ (75,532)
Net cash used in investing activities	(12,779)	(88,966)	(139,206)	(28,644)
Net cash provided by/ (used in) from financing activities	(4,867)	(33,883)	614,884	217,446
Effect of exchange rate changes	502	3,504	(9,352)	(8,282)
Net increase/ (decrease) in cash and cash equivalents and restricted cash	(20,843)	(145,103)	368,401	104,988
Cash, cash equivalents and restricted cash at the beginning of year	82,835	576,677	208,276	103,288
Cash, cash equivalents and restricted cash at the end of year	61,992	431,574	576,677	208,276
Parent Company
Condensed Cash Flow Statements Captions [Line Items]
Net cash (used in)/ provided by operating activities	2,194	15,273	16,052	(744)
Net cash used in investing activities	(13,705)	(95,412)	(535,995)	(157,412)
Net cash provided by/ (used in) from financing activities	(4,862)	(33,845)	614,884	217,446
Effect of exchange rate changes	(1,403)	(9,763)	24,866	(7,695)
Net increase/ (decrease) in cash and cash equivalents and restricted cash	(17,776)	(123,747)	119,807	51,595
Cash, cash equivalents and restricted cash at the beginning of year	34,221	238,236	118,429	66,834
Cash, cash equivalents and restricted cash at the end of year	$ 16,445	¥ 114,489	¥ 238,236	¥ 118,429

- Definition

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References + Details

- Definition

Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References + Details

- Definition

Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References + Details

- Definition

+ References + Details