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TAXATION - Schedule of Deferred Tax Assets and Liabilities (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Deferred tax assets |  |  |  |
Net accumulated losses-carry forward | ¥ 108,667 | ¥ 205,487 |  |
Refund payable to members | 172 | 1,100 |  |
Inventory write-downs | 1,749 | 2,632 |  |
Allowance for credit losses | 2,813 | 3,272 |  |
Others | 1,021 | 4,101 |  |
Less: valuation allowance | (96,489) | (156,150) | ¥ (65,225) | ¥ (10,004)
Total deferred tax assets | 18,145 | ¥ 60,442 |  |
Deferred Membership programme [Member] |  |  |  |
Deferred tax assets |  |  |  |
Deferred membership program revenue | ¥ 212 |  |  |

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