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ACCRUED LIABILITIES AND OTHER PAYABLES - Additional Information (Details) - CNY (¥) | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of ACCRUED LIABILITIES AND OTHER PAYABLES [Line Items] |  |
Deposits received from distributors | ¥ 16,200,000 | ¥ 16,200,000
Minimum |  |
Disclosure Of ACCRUED LIABILITIES AND OTHER PAYABLES [Line Items] |  |
Deposits received from distributors | 400,000 |
Maximum |  |
Disclosure Of ACCRUED LIABILITIES AND OTHER PAYABLES [Line Items] |  |
Deposits received from distributors | ¥ 1,000,000 |

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