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INVESTMENTS - Equity-method investments (Details)
¥ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Equity-method investments        
Equity-method investments ¥ 1,289   ¥ 1,392  
Income (loss) from equity method investments (14) $ (2) (36) ¥ (60)
Impairment loss 66   27  
AAPC LUB        
Equity-method investments        
Equity-method investments 490   494  
Hotel related funds        
Equity-method investments        
Equity-method investments ¥ 479   ¥ 574