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Employee benefit expenses (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Employee benefit expenses      
Wages and salaries ¥ 1,235,714 ¥ 1,276,205 ¥ 1,319,554
Welfare and other benefits 353,099 330,552 248,870
Share-based payments (Note 26) 13,176 22,618 74,980
Employee benefit expenses ¥ 1,601,989 ¥ 1,629,375 ¥ 1,643,404