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LEASE (Lease income) (Details) - 12 months ended Dec. 31, 2019
¥ in Thousands, $ in Thousands
USD ($)
CNY (¥)
Sales Type Leases [Member]    
Lessee, Lease, Description [Line Items]    
Selling loss recognized at the commencement date $ (3,049) ¥ (21,229)
Interest income on net investment in the lease 162 1,130
Including: Income relating to variable lease payments not included in the measurement of the net investment in a lease 162 1,130
Direct Financing Leases [Member]    
Lessee, Lease, Description [Line Items]    
Interest income on net investment in the lease 567 3,944
Operating leases [Member]    
Lessee, Lease, Description [Line Items]    
Lease income relating to lease payments 7,683 53,485
Including: Income relating to variable lease payments not included in the measurement of lease receivable $ 6,591 ¥ 45,887