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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2016
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] |
Schedule of Cash, Cash Equivalents, Time Deposits and Restricted Time Deposits |
|  | December 31, |
|  | 2015 |  | 2016 |
|  | RMB |  | RMB |
RMB denominated bank deposits with financial institutions in the PRC |  |  | 627,148 |  |  | 867,811 |
US dollar denominated bank deposits with a financial institutions in the PRC |  |  | 52,680 |  |  | 152,792 |
US dollar denominated bank deposits with financial institutions in Hong Kong Special Administrative Region (“HK SAR”) |  |  | 645 |  |  | 3,535 |
HK dollar denominated bank deposits with a financial institution in HK SAR |  |  | 99 |  |  | 1 |
RMB denominated bank deposits with a financial institution in HK SAR |  |  | 3 |  |  | 3 |
RMB denominated bank deposits with financial institutions in the U.S. |  |  | 547,388 |  |  | - |
US dollar denominated bank deposits with financial institutions in the U.S. |  |  | 55 |  |  | 261,913 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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