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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Consolidated Statements of Comprehensive Income (Loss)      
Fair value fluctuation of available-for-sale investment, net of tax ¥ 0 ¥ 0 ¥ 0