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LEASES - Lease assets obtained in exchange for lease obligations (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
LEASES        
Operating leases ¥ 11,016 $ 1,552 ¥ 47,288 ¥ 6,915
Finance leases ¥ 169,350 $ 23,852 ¥ 175,324