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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' (DEFICIT)/EQUITY ¥ in Thousands, $ in Thousands | Ordinary shares CNY (¥) shares | Treasury stock shares | Additional paid-in capital CNY (¥) | Accumulated deficit CNY (¥) | Accumulated other comprehensive gain/(loss) CNY (¥) | CNY (¥) | USD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | ¥ 60 |  |  | ¥ (180,977) | ¥ (9,719) | ¥ (190,636) |
Balance (in shares) at Dec. 31, 2015 | shares | 94,870,580 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation |  |  | ¥ 2,860 |  |  | 2,860 |
Deemed capital contribution |  |  | 837 |  |  | 837 |
Accretions to pre-IPO preferred shares redemption value |  |  | (3,697) | (13,208) |  | (16,905) |
Net loss |  |  |  | (86,568) |  | (86,568) |
Foreign currency translation adjustments |  |  |  |  | 317 | 317 |
Balance at Dec. 31, 2016 | ¥ 60 |  |  | (280,753) | (9,402) | (290,095) |
Balance (in shares) at Dec. 31, 2016 | shares | 94,870,580 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation |  |  | 1,896 |  |  | 1,896 |
Deemed capital contribution |  |  | 1,147 |  |  | 1,147 |
Accretions to pre-IPO preferred shares redemption value |  |  | (3,043) | (17,902) |  | (20,945) |
Net loss |  |  |  | (90,671) |  | (90,671) |
Foreign currency translation adjustments |  |  |  |  | (1,367) | (1,367) |
Balance at Dec. 31, 2017 | ¥ 60 |  |  | (389,326) | (10,769) | (400,035) |
Balance (in shares) at Dec. 31, 2017 | shares | 94,870,580 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Grant of restricted shares | ¥ 16 |  | (16) |  |  |  |
Grant of restricted shares (in shares) | shares | 24,407,184 | (24,407,184) |  |  |  |  |
Share issuance upon the initial public offering, net of issuance costs | ¥ 7 |  | 103,365 |  |  | 103,372 |
Share issuance upon the initial public offering, net of issuance costs (in shares) | shares | 10,400,000 |  |  |  |  |  |
Share issuance upon the conversion and redesignation of Pre-IPO preferred shares into Class A ordinary shares | ¥ 118 |  | 930,318 |  |  | 930,436 |
Share issuance upon the conversion and redesignation of Pre-IPO preferred shares into Class A ordinary shares (in shares) | shares | 171,102,902 |  |  |  |  |  |
Vesting of restricted shares |  |  | 71,209 |  |  | 71,209 |
Vesting of restricted shares (in shares) | shares |  | 12,917,926 |  |  |  |  |
Vesting of share options |  |  | 576 |  |  | 576 |
Share-based compensation for super voting right |  |  | 4,657 |  |  | 4,657 |
Share-based compensation for transfer of Class A ordinary shares |  |  | 1,690 |  |  | 1,690 |
Deemed capital contribution |  |  | 450 |  |  | 450 |
Accretions to pre-IPO preferred shares redemption value |  |  | (35,066) |  |  | (35,066) |
Net loss |  |  |  | (78,700) |  | (78,700) | $ (11,445)
Foreign currency translation adjustments |  |  |  |  | 3,401 | 3,401 | 495
Balance at Dec. 31, 2018 | ¥ 201 |  | ¥ 1,077,183 | ¥ (468,026) | ¥ (7,368) | ¥ 601,990 | $ 87,555
Balance (in shares) at Dec. 31, 2018 | shares | 300,780,666 | (11,489,258) |  |  |  |  |

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