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SHARE CAPITAL- Summary of warrant activity (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 18, 2019 $ / shares | Dec. 04, 2018 USD ($) | Dec. 31, 2020 CNY (¥) $ / shares | Dec. 31, 2019 CNY (¥) $ / shares | Dec. 31, 2018 CNY (¥) $ / shares
SHARE CAPITAL |  |  |  |  |
Outstanding at the beginning | ¥ |  |  | 556,479 | 247,619 |
Exercisable at the beginning | ¥ |  |  | 556,479 | 247,619 |
Granted | 0.68 | 1.18 | 404,415 | 420,000 |
Exercised | ¥ |  |  |  | 111,140 |
Outstanding at the end | ¥ |  |  | 960,894 | 556,479 | 247,619
Exercisable at the end | ¥ |  |  | 960,894 | 556,479 | 247,619
Weighted average exercise price of other equity instruments outstanding at beginning of period |  |  | $ 4.56 | $ 7.74 |
Weighted average exercise price of other equity instruments exercisable at beginning of period |  |  | 4.56 | 7.74 |
Weighted average exercise price, Granted |  |  | 0.80 | 2.49 |
Weighted average exercise price, Exercised |  |  |  | 3.90 |
Weighted average exercise price of other equity instruments outstanding at end of period |  |  | 1.21 | 4.56 | $ 7.74
Weighted average exercise price of other equity instruments exercisable at end of period |  |  | $ 1.21 | $ 4.56 | $ 7.74
Weighted average remaining contractual term, exercisable at the end (in years) |  |  | 3 years 10 months 6 days | 4 years 4 months 17 days | 4 years 2 months 9 days
Weighted average remaining contractual term, Granted |  |  | 5 years | 5 years |
Weighted average remaining contractual term, outstanding at the end (in years) |  |  | 3 years 10 months 6 days | 4 years 4 months 17 days | 4 years 2 months 9 days

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