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CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands | Dec. 31, 2016 CNY (¥) shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 CNY (¥) shares | Dec. 31, 2015 USD ($) $ / shares shares
--- | --- | --- | --- | ---
Current assets: |  |  |  |
Cash | ¥ 810,672 |  | ¥ 513,938 |
Property and equipment, net | 437,337 |  | 127,864 |
Investments, Fair Value Disclosure | 15,000 |  |  |
Long-term Investments | 41,760 |  | 24,000 |
Other non-current assets | 91,849 |  | 53,111 |
Current liabilities: |  |  |  |
Income taxes payable | 91,240 |  | 56,293 |
Accrued expenses and other current liabilities | 117,867 |  | 79,835 |
Other non-current liabilities | ¥ 7,043 |  | ¥ 9,333 |
Common Class A [Member] |  |  |  |
Ordinary shares |  |  |  |
Ordinary shares, par value | $ / shares |  | $ 0.001 |  | $ 0.001
Authorized | shares | 860,000,000 | 860,000,000 | 860,000,000 | 860,000,000
Issued | shares | 48,735,228 | 48,735,228 | 44,914,538 | 44,914,538
Outstanding | shares | 47,160,248 | 47,160,248 | 43,988,425 | 43,988,425
Treasury shares | shares | 1,574,980 | 1,574,980 | 926,113 | 926,113
Common Class B [Member] |  |  |  |
Ordinary shares |  |  |  |
Ordinary shares, par value | $ / shares |  | $ 0.001 |  | $ 0.001
Authorized | shares | 40,000,000 | 40,000,000 | 40,000,000 | 40,000,000
Issued | shares | 8,895,249 | 8,895,249 | 10,574,896 | 10,574,896
Outstanding | shares | 8,895,249 | 8,895,249 | 10,574,896 | 10,574,896
VIE [Member] |  |  |  |
Current assets: |  |  |  |
Cash | ¥ 630 |  | ¥ 1,043 |
Property and equipment, net | 3 |  | 18 |
Investments, Fair Value Disclosure |  |  |  |
Long-term Investments | 35,000 |  | 18,000 |
Other non-current assets | 716 |  | 266 |
Current liabilities: |  |  |  |
Income taxes payable | 3,729 |  | 3,737 |
Accrued expenses and other current liabilities | 176 |  | 892 |
Other non-current liabilities | ¥ 267 |  | ¥ 267 |

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