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v3.21.1

Additional Information - Condensed Financial Statements of the Parent Company - Condensed balance sheets (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Current assets: |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 16,845 |  |  | ¥ 109,916 | $ 29,720 | ¥ 193,920 | ¥ 578,558 | ¥ 66,695
Time deposit | 7,000 |  |  | 45,674 |  | 69,762 |  |
Non-current assets: |  |  |  |  |  |  |  |
Other non-current assets | 48 |  |  | 313 |  | 7,577 |  |
Total non-current assets | 24,981 |  |  | 163,006 |  | 35,811 |  |
Current liabilities: |  |  |  |  |  |  |  |
Other taxes payable | 3,524 |  |  | 22,992 |  | 22,494 |  |
Total current liabilities | 26,998 |  |  | 176,164 |  | 142,062 |  |
Non-current liabilities: |  |  |  |  |  |  |  |
Other non-current liabilities | 230 |  |  | 1,498 |  | 2,158 |  |
Total non-current liabilities | 1,713 |  |  | 11,182 |  | 2,158 |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Treasury stock | (7,032) |  |  | (45,886) |  | (46,533) |  |
Additional paid-in capital | 187,177 |  |  | 1,221,339 |  | 1,187,577 |  |
Accumulated deficit | (135,126) |  |  | (881,700) |  | (718,666) |  |
Accumulated other comprehensive income/(loss) | (890) |  |  | (5,805) |  | 1,048 |  |
TOTAL SHAREHOLDERS' EQUITY | 44,162 |  |  | 288,164 |  | 423,634 |  |
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY | 72,704 |  |  | 474,407 |  | 567,195 |  |
Class A ordinary shares |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Ordinary shares | 28 |  |  | 181 |  | 173 |  |
Class B ordinary shares |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Ordinary shares | 5 |  |  | 35 |  | 35 |  |
Reportable Legal Entities Member | Parent Company [Member] |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |
Cash and cash equivalents | 7,127 |  |  | 46,501 |  | 102,002 |  |
Time deposit | 7,000 |  |  | 45,674 |  | 69,762 |  |
Prepayment and other current assets | (1,977) |  |  | (12,897) |  | 104,572 |  |
Receivables due from subsidiaries, VIEs and subsidiaries of VIEs | 18,319 |  |  | 119,533 |  | 110,348 |  |
Total current assets | 30,469 |  |  | 198,811 |  | 386,684 |  |
Non-current assets: |  |  |  |  |  |  |  |
Investments in subsidiaries, VIEs and subsidiaries of VIEs | 14,937 | ¥ 97,465 | ¥ 46,087 |  |  |  |  |
Total non-current assets | 14,937 |  |  | 97,465 |  | 46,087 |  |
TOTAL ASSETS | 45,406 |  |  | 296,276 |  | 432,771 |  |
Current liabilities: |  |  |  |  |  |  |  |
Other taxes payable | 954 |  |  | 6,224 |  | 6,654 |  |
Other current liabilities | 60 |  |  | 390 |  | 325 |  |
Total current liabilities | 1,014 |  |  | 6,614 |  | 6,979 |  |
Non-current liabilities: |  |  |  |  |  |  |  |
Other non-current liabilities | 230 |  |  | 1,498 |  | 2,158 |  |
Total non-current liabilities | 230 |  |  | 1,498 |  | 2,158 |  |
TOTAL LIABILITIES | 1,244 |  |  | 8,112 |  | 9,137 |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Treasury stock | (7,032) |  |  | (45,886) |  | (46,533) |  |
Additional paid-in capital | 187,177 |  |  | 1,221,339 |  | 1,187,577 |  |
Accumulated deficit | (135,126) |  |  | (881,700) |  | (718,666) |  |
Accumulated other comprehensive income/(loss) | (890) |  |  | (5,805) |  | 1,048 |  |
TOTAL SHAREHOLDERS' EQUITY | 44,162 |  |  | 288,164 |  | 423,634 |  |
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY | 45,406 |  |  | 296,276 |  | 432,771 |  |
Reportable Legal Entities Member | Class A ordinary shares | Parent Company [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Ordinary shares | 28 |  |  | 181 |  | 173 |  |
Reportable Legal Entities Member | Class B ordinary shares | Parent Company [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |  |  |  |
Ordinary shares | $ 5 |  |  | ¥ 35 |  | ¥ 35 |  |

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