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Taxation - Composition of income tax (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Taxation        
Current income tax expenses ¥ 122,451   ¥ 102,715 ¥ 48,081
Withholding income tax expenses 18,189   14,066 18,754
Deferred tax benefits (36,495) $ (5,291) (21,492) (13,466)
Total ¥ 104,145 $ 15,100 ¥ 95,289 ¥ 53,369