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TAXATION - (Schedule of (Loss) Income from Continuing Operations Before Income Taxes) (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
TAXATION        
Non - PRC ¥ 5,451 $ 855 ¥ (142,750) ¥ (127,243)
PRC (534,688) (83,905) (298,903) (263,835)
Loss before income tax ¥ (529,237) $ (83,050) ¥ (441,653) ¥ (391,078)