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RELATED PARTY TRANSACTIONS - Related party balances (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
RELATED PARTY TRANSACTIONS      
Amounts due from subsidiaries ¥ 169,453 $ 24,568 ¥ 145,692
Amount due to related parties, current portion 13,105 1,900 12,108
Amounts due to related parties, non-current portion 122,579 17,772 83,778
Due to related parties, non-current, due within 1 year 133,856 19,407 35,993
Zhejiang Marine Leasing Ltd      
RELATED PARTY TRANSACTIONS      
Amounts due to related parties, non-current portion 122,579 17,772 83,778
Due to related parties, non-current, due within 1 year 123,855 17,957 26,753
Cherrylane Investment Limited      
RELATED PARTY TRANSACTIONS      
Amount due to related parties, current portion 13,105 1,900 12,108
Due to related parties, non-current, due within 1 year 10,001 1,450 9,240
Guangdong Proton International Hospital Management Co., Ltd      
RELATED PARTY TRANSACTIONS      
Amounts due from subsidiaries ¥ 169,453 $ 24,568 ¥ 145,692