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CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 $ / shares
--- | --- | ---
Accounts payable | $ 20,014 |
Salary and welfare payables | 7,286 |
Taxes payable | 5,076 |
Deferred revenue | 1,173 |
Accrued liabilities and other payables | $ 4,784 |
Shareholder's Equity: |  |
Ordinary shares, par value (in US dollar per share) | $ / shares | $ 0.0001 | $ 0.0001
Ordinary shares, shares authorized (in shares) | 0 |
Ordinary shares, shares issued (in shares) | 0 |
Ordinary shares, shares outstanding (in shares) | 0 |
Treasury stock (in shares) | 2,561,468 |
Series A-1 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series A-2 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series B-1 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series B-2 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series B-3 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series B-4 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Series C-1 Convertible Redeemable Preferred Stock |  |
Mezzanine equity |  |
Convertible redeemable preferred shares, par value | $ / shares | $ 0.0001 | 0.0001
Convertible redeemable preferred shares, shares authorized (in shares) | 0 |
Convertible redeemable preferred shares, shares issued (in shares) | 0 |
Convertible redeemable preferred shares, shares outstanding (in shares) | 0 |
Class A ordinary shares |  |
Shareholder's Equity: |  |
Ordinary shares, par value (in US dollar per share) | $ / shares | $ 0.0001 | $ 0.0001
Ordinary shares, shares authorized (in shares) | 4,903,917,300 |
Ordinary shares, shares issued (in shares) | 841,275,820 |
Ordinary shares, shares outstanding (in shares) | 841,275,820 |
Class B ordinary shares |  |
Shareholder's Equity: |  |
Ordinary shares, par value (in US dollar per share) | $ / shares | $ 0.0001 |
Ordinary shares, shares authorized (in shares) | 96,082,700 |
Ordinary shares, shares issued (in shares) | 96,082,700 |
Ordinary shares, shares outstanding (in shares) | 96,082,700 |

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