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LEASES - Sale and Lease Back (Details)
1 Months Ended 9 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 (¥)
Sep. 30, 2020
CNY (¥)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
CNY (¥)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
Sep. 30, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
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           ¥ 11,718,901,678         $ 1,726,007,670 ¥ 10,208,204,549
Amortized deferred losses related to sale-leaseback transactions           ¥ 20,367,872 $ 2,999,863 ¥ 25,882,978        
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