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SHARE CAPITAL- Summary of warrant activity (Details)
 6 Months Ended 12 Months Ended
Jun. 14, 2021
$ / shares
Feb. 17, 2021
Jun. 30, 2022
CNY (¥)
$ / shares
Dec. 31, 2020
CNY (¥)
$ / shares
SHARE CAPITAL        
Granted 3.15 4.45    
Outstanding at the end | ¥     1,868,414 1,868,414
Exercisable at the end | ¥     1,868,414 1,868,414
Weighted average exercise price of other equity instruments outstanding at end of period | $ / shares     $ 3.50 $ 3.50
Weighted average exercise price of other equity instruments exercisable at end of period | $ / shares     $ 3.50 $ 3.50
Weighted average remaining contractual term, exercisable at the end (in years)     3 years 7 months 24 days 4 years 1 month 20 days
Weighted average remaining contractual term, outstanding at the end (in years)     3 years 7 months 24 days 4 years 1 month 20 days