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REDEEMABLE NON-CONTROLLING INTERESTS (Tables)
12 Months Ended
Dec. 31, 2019
REDEEMABLE NON-CONTROLLING INTERESTS  
Schedule of redeemable non-controlling interest

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​

​

​

​

​

​

    

2018

    

2019

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​

RMB

​

RMB

Balance at beginning of year

​

228,230

​

225,645

Share-based compensation

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7,911

​

—

Net loss attributable to mezzanine equity holders

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(10,496)

​

(8,671)

Balance at end of year

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225,645

​

216,974