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LEASE ( Schedule of non-cancellable operating lease payment) (Details) - Dec. 31, 2020
¥ in Thousands, $ in Thousands
CNY (¥)
USD ($)
LEASE    
2021 ¥ 8,972 $ 1,375
2022 8,972 1,375
2023 7,886 1,209
2024 7,196 1,103
2025 5,496 842
Above 5 years ¥ 13,708 $ 2,101