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ACCOUNTS RECEIVABLE, NET-THIRD PARTIES (Schedule of Accounts Receivable) (Details)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
ACCOUNTS RECEIVABLE, NET-THIRD PARTIES [Line Items]          
Accounts receivables ¥ 5,692,976,209   ¥ 4,762,291,432    
Allowance for doubtful accounts (256,605,518)   (264,656,904) ¥ (376,574,061) ¥ (335,713,383)
Accounts receivable, net 5,436,370,691 $ 790,687,323 4,497,634,528    
Amount of accounts receivable pledged as collateral for borrowings ¥ 385,443,577   ¥ 78,951,541