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ADDITIONAL FINANCIAL INFORMATION - FINANCIAL STATEMENTS SCHEDULE I - BALANCE SHEETS (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Jan. 01, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
--- | --- | --- | --- | ---
Current assets: |  |  |  |
Cash and cash equivalents | $ 83,496 | ¥ 581,281 |  | ¥ 853,740
Short-term investments |  |  |  | 252,805
Prepayments and other current assets | 29,965 | 208,604 | ¥ 159,776 | 161,147
Total current assets | 212,795 | 1,481,431 |  | 1,507,097
Long-term investments | 20 | 140 |  | 11,140
Total assets | 231,305 | 1,610,293 | 1,607,455 | 1,546,418
Other non-current liabilities | 853 | 5,936 |  | 8,135
Total liabilities | 120,138 | 836,370 | 383,691 | 322,654
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Treasury shares (nil and 1,485,862 shares as of December 31 2018 and 2019, respectively) | (3,302) | (22,991) |  |
Additional paid-in capital | 374,398 | 2,606,486 |  | 2,540,878
Accumulated deficit | (270,524) | (1,883,335) |  | (1,383,729)
Accumulated other comprehensive income | 10,980 | 76,441 |  | 67,073
Total shareholders' equity | 111,560 | 776,656 |  | 1,224,276
Total liabilities and equity | 231,305 | 1,610,293 | ¥ 1,607,455 | 1,546,418
Ordinary shares Class A |  |  |  |
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Ordinary shares, value | 4 | 30 |  | 29
Ordinary shares Class B |  |  |  |
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Ordinary shares, value | 4 | 25 |  | 25
Parent |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 25,281 | 176,001 |  | 262,859
Short-term investments |  |  |  | 115,815
Prepayments and other current assets | 87,466 | 608,918 |  | 538,543
Total current assets | 112,747 | 784,919 |  | 917,217
Long-term investments |  |  |  | 317,478
Total assets | 112,747 | 784,919 |  | 1,234,695
Other current liabilities | 334 | 2,327 |  | 2,284
Other non-current liabilities | 853 | 5,936 |  | 8,135
Total liabilities | 1,187 | 8,263 |  | 10,419
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Treasury shares (nil and 1,485,862 shares as of December 31 2018 and 2019, respectively) | (3,302) | (22,991) |  |
Additional paid-in capital | 374,398 | 2,606,486 |  | 2,540,878
Accumulated deficit | (270,524) | (1,883,335) |  | (1,383,729)
Accumulated other comprehensive income | 10,980 | 76,441 |  | 67,073
Total shareholders' equity | 111,560 | 776,656 |  | 1,224,276
Total liabilities and equity | 112,747 | 784,919 |  | 1,234,695
Parent | Ordinary shares Class A |  |  |  |
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Ordinary shares, value | 4 | 30 |  | 29
Parent | Ordinary shares Class B |  |  |  |
SHAREHOLDERS' (DEFICIT) EQUITY |  |  |  |
Ordinary shares, value | $ 4 | ¥ 25 |  | ¥ 25

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