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INCOME TAX EXPENSE/(CREDIT) - Additional Information (Details) - CNY (¥) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2008
Disclosure of INCOME TAX EXPENSE CREDIT [Line Items] |  |  |  |
Applicable tax rate | 0.00% | 25.00% |  |
Dividend withholding tax rate |  |  |  | 10.00%
Undistributed earnings | ¥ 241,065,000 | ¥ 267,193,000 | ¥ 329,503,000 |
Deferred tax liabilities further recognition | 8,704,000 | 13,360,000 | 16,475,000 |
HONG KONG |  |  |  |
Disclosure of INCOME TAX EXPENSE CREDIT [Line Items] |  |  |  |
Applicable tax rate | 8.25% | 8.25% | 8.25% |
Dividend withholding tax rate |  |  |  | 5.00%

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