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EMPLOYEE BENEFITS (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Classes of employee benefits expense [abstract]      
Wages and salaries ¥ 6,135,683 ¥ 5,949,037 ¥ 5,726,123
Provision for medical, housing scheme and other employee benefits (a) 1,399,931 1,326,476 1,353,800
Contributions to the defined contribution scheme (b) 1,153,849 408,922 999,020
Total employee benefits ¥ 8,689,463 ¥ 7,684,435 ¥ 8,078,943