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EMPLOYEE BENEFIT PLANS - Defined Contribution Plans (Details) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
EMPLOYEE BENEFIT PLANS      
Total contribution for employee benefits ¥ 645 ¥ 544 ¥ 283
Contributions recognized as expense ¥ 74 ¥ 55 ¥ 129