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CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 CNY (¥) shares
--- | --- | --- | ---
Accounts receivable, allowance | ¥ 4,932 | $ 774 | ¥ 6,473
Reserve for prepayments and other current assets | 14,853 | 2,331 | 12,528
Prepayments and other current assets, due from related party | 145,692 | 22,862 | 1,845
Reserve for deposits of non-current assets | ¥ | 0 |  | 8,500
Short-term bank and other borrowings, loan from related party | 12,108 | 1,900 | 3,191
Long-term bank and other borrowings, current portion, loan from related party | 35,993 | 5,648 | 82,606
Long-term bank and other borrowings, non-current portion, loan from related party | ¥ 83,778 | $ 13,147 | ¥ 102,757
Treasury stock, shares | 12,101,847 | 12,101,847 | 12,101,847
Common Class A |  |  |
Ordinary shares, par value per share | $ / shares |  | $ 0.0001 |
Ordinary shares, shares authorized | 500,000,000 | 500,000,000 | 500,000,000
Ordinary shares, shares issued | 96,565,584 | 96,565,584 | 96,565,584
Ordinary shares, shares outstanding | 84,463,737 | 84,463,737 | 84,463,737
Common Class B |  |  |
Ordinary shares, par value per share | $ / shares |  | $ 0.0001 |
Ordinary shares, shares authorized | 45,787,948 | 45,787,948 | 45,787,948
Ordinary shares, shares issued | 45,787,948 | 45,787,948 | 45,787,948
Ordinary shares, shares outstanding | 45,787,948 | 45,787,948 | 45,787,948

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