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LEASES - Sale and Lease Back (Details)
1 Months Ended 12 Months Ended
May 31, 2018
CNY (¥)
Jan. 31, 2018
CNY (¥)
Nov. 30, 2017
CNY (¥)
Jul. 31, 2017
CNY (¥)
May 31, 2017
CNY (¥)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2019
USD ($)
Sale Leaseback Transaction [Line Items]                        
Sale leaseback transaction, lease terms   three years   four years three years         P3Y P3Y  
Finance expenses for early termination of contract                   ¥ 1,400,000 ¥ 1,400,000  
Sale leaseback transaction, carrying amount   ¥ 52,000,000.0   ¥ 815,400,000 ¥ 201,100,000              
Sale leaseback transaction, consideration   50,000,000.0   600,000,000.0 150,000,000.0              
Loss on sale leaseback transaction   2,000,000.0   215,400,000 ¥ 51,100,000              
Ownership upon expiration of lease term   ¥ 1,000,000.0   ¥ 600,000                
Financing lease term 2 years   2 years                  
Carrying amount of leased asset           ¥ 10,208,204,549   ¥ 8,275,899,684       $ 1,466,316,836
Amortized deferred losses related to sale-leaseback transactions           ¥ 33,560,902 $ 4,820,722 ¥ 36,638,880 ¥ 14,714,339      
Machinery And Equipment Under Lease [Member]                        
Sale Leaseback Transaction [Line Items]                        
Carrying amount of leased asset ¥ 72,000,000.0   ¥ 74,900,000                  
Minimum [Member]                        
Sale Leaseback Transaction [Line Items]                        
Sale leaseback transaction, lease terms                   one one  
Maximum [Member]                        
Sale Leaseback Transaction [Line Items]                        
Sale leaseback transaction, lease terms                   P3Y P3Y