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TAXATION - Reconciliation (Details) - China | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Reconciliation between total income tax expense and the amount computed by applying the weighted average statutory income tax rate to income before income taxes |  |
PRC statutory income tax rate | 25.00% | 25.00%
Impact of different tax rates in other jurisdictions | (196.00%) | 0.00%
Tax effect of preferential tax rate for small enterprises | 15.00% | 28.00%
Tax effect of non-deductible expenses | 48.00% | 8.00%
Tax effect of non-taxable income | (281.00%) | (3.00%)
Tax effect of tax-exempt entities | 548.00% | (24.00%)
Tax effect of deemed profit | 0.00% | 1.00%
Deferred tax effect of tax rate change | 54.00% | 7.00%
Changes in valuation allowance | (182.00%) | (27.00%)
Effective tax rate | 31.00% | 15.00%

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