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INCOME TAX EXPENSE/(CREDIT) (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current Tax:      
PRC Income Tax ¥ 217 ¥ 33 ¥ 29
Reversal of income tax refundable 0   27
Current tax expense (income) and adjustments for current tax of prior periods 0    
Deferred tax expense 0    
Tax per financial statements ¥ 217 ¥ 33 ¥ 56