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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, 2021 CNY (¥) $ / shares | Dec. 31, 2020 CNY (¥) $ / shares
SHARE CAPITAL |  |  |  |
Outstanding at the beginning | ¥ |  |  | 980,894 |
Exercisable at the beginning | ¥ |  |  | 980,894 |
Granted | 3.15 | 4.45 | 1,652,322 |
Exercised | ¥ |  |  | 700,516 |
Expired | ¥ |  |  | 64,286 |
Outstanding at the end | ¥ |  |  | 1,868,414 | 980,894
Exercisable at the end | ¥ |  |  | 1,809,590 | 980,894
Weighted average exercise price of other equity instruments outstanding at beginning of period |  |  | $ 1.21 |
Weighted average exercise price of other equity instruments exercisable at beginning of period |  |  | 1.21 |
Weighted average exercise price, Granted |  |  | 3.56 |
Weighted average exercise price, Exercised |  |  | 2.43 |
Weighted average exercise price, Expired |  |  | 18.72 |
Weighted average exercise price of other equity instruments outstanding at end of period |  |  | 4.00 | $ 1.21
Weighted average exercise price of other equity instruments exercisable at end of period |  |  | $ 3.99 | $ 1.21
Weighted average remaining contractual term, exercisable at the end (in years) |  |  | 4 years 5 months 23 days | 3 years 10 months 6 days
Weighted average remaining contractual term, Granted |  |  | 5 years |
Weighted average remaining contractual term, outstanding at the end (in years) |  |  | 4 years 5 months 26 days | 3 years 10 months 6 days

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