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REDEEMABLE NONCONTROLLING INTEREST - Reconciliation (Details)
12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
NONCONTROLLING INTEREST        
Redeemable noncontrolling interest opening balance ¥ 0 $ 0 ¥ 349,046,548 ¥ 349,046,548
Net loss attributable to redeemable noncontrolling interest 0 0   (1,190,122)
Change in redeemable noncontrolling interest     (349,046,548) 1,190,122
Redeemable noncontrolling interest ending balance ¥ 0 $ 0 ¥ 0 ¥ 349,046,548