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LEASE (Schedule of non-cancellable direct financing leases) (Details) - Dec. 31, 2020
¥ in Thousands, $ in Thousands
CNY (¥)
USD ($)
LEASE    
2021 ¥ 19,570 $ 2,999
2022 10,184 1,561
2023 9,427 1,445
2024 ¥ 2,123 $ 325