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PREPAID LAND LEASE PAYMENTS (Schedule of Estimated Annual Amortization Expenses) (Details) - Dec. 31, 2018
¥ in Thousands, $ in Thousands
CNY (¥)
USD ($)
Leases [Abstract]    
2019 ¥ 9,462 $ 1,376
2020 9,462 1,376
2021 9,462 1,376
2022 9,462 1,376
2023 ¥ 9,462 $ 1,376