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PROPERTY, EQUIPMENT AND SOFTWARE, NET - Additional Information (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Depreciation Expenses ¥ 15,985 ¥ 21,054 ¥ 18,021
Impairment Charges 0 0 ¥ 0
Construction in Progress [Member]      
Balances Of Construction In Progress ¥ 245 ¥ 874