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Consolidated Balance Sheets (Parenthetical) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 CNY (¥) shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 $ / shares | Dec. 31, 2018 CNY (¥) shares
--- | --- | --- | --- | ---
Available for sale investments | ¥ | ¥ 642,759 |  |  | ¥ 438,077
Accounts receivable, allowance for doubtful accounts | ¥ | 0 |  |  | 0
Loan receivables, allowance for loan losses | 5,147 | $ 739 |  | 2,556
Loan receivables from factoring business, allowance for doubtful accounts | ¥ | 0 |  |  | 0
Long-term investments measured at fair value | ¥ | ¥ 531,359 |  |  | ¥ 624,045
Ordinary shares, treasury stock | 0 | 0 |  | 140,479
Class A |  |  |  |
Ordinary shares, par value | $ / shares |  | $ 0.0005 | $ 0.0005 |
Ordinary shares, shares authorized | 91,394,900 | 91,394,900 |  | 91,394,900
Ordinary shares, shares issued | 22,484,657 | 22,484,657 |  | 21,890,253
Ordinary shares, shares outstanding | 22,484,657 | 22,484,657 |  | 21,749,774
Class B |  |  |  |
Ordinary shares, par value | $ / shares |  | $ 0.0005 | $ 0.0005 |
Ordinary shares, shares authorized | 8,605,100 | 8,605,100 |  | 8,605,100
Ordinary shares, shares issued | 8,315,000 | 8,315,000 |  | 8,315,000
Ordinary shares, shares outstanding | 8,315,000 | 8,315,000 |  | 8,315,000

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