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SHARE CAPITAL- Classes of Share Capital (Details) ¥ in Thousands, $ in Thousands | 2 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2019 CNY (¥) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2019 CNY (¥) shares
Disclosure Of SHARE CAPITAL [Line Items] |  |  |  |  |  |  |
Number of shares authorised |  | 50,000,000 |  |  | 50,000,000 |  |
Issued capital | ¥ 306 | $ 58,000 | ¥ 397 | [1] |  | ¥ 306 |
Issuance of new shares | ¥ |  |  | 181 |  |  | 67 |
Warrants exercised into shares | ¥ |  |  |  |  |  | 1,716 |
Equity compensation | ¥ |  |  | 13 |  |  | 5 |
Issued capital |  | 91,000 | ¥ 591 | [2] | $ 58,000 | ¥ 397 | [1]
Value of Shares authorised | $ |  | $ 1,200 |  |  | $ 1,200 |  |
Balance | 5,678,703 | 2,435,662 | 2,435,662 |  | 5,678,703 | 5,678,703 |
Issuance of new shares (in shares) |  | 1,156,251 |  |  | 1,200,000 |  |
Warrants exercised into shares (in shares) | 333,420 |  |  |  |  |  |
Equity compensation (in shares) |  | 82,457 | 82,457 |  | 94,862 | 94,862 |
Ending Balance (in shares) |  | 3,674,370 | 3,674,370 |  | 2,435,662 | 2,435,662 |
Share capital [member] |  |  |  |  |  |  |
Disclosure Of SHARE CAPITAL [Line Items] |  |  |  |  |  |  |
Warrants exercised into shares | ¥ |  |  | ¥ 0 |  |  | ¥ 19 |
Warrants exercised into shares (in shares) |  | 0 | 0 |  | 333,420 | 333,420 |
[1] | (1) Equivalent to US$58,000
[2] | (2) Equivalent to US$91,000* reflect 3:1 reverse stock split

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