The lease term.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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BORROWINGS - Long-term Narrative details (Details)	12 Months Ended				24 Months Ended
BORROWINGS - Long-term Narrative details (Details)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 MXN ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Jan. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Jul. 31, 2017 CNY (¥)	Jul. 17, 2017 CNY (¥)	May 31, 2017 CNY (¥)
Debt Instrument [Line Items]
Debt term	1 year				1 year
Debt, face amount							¥ 300,000,000					¥ 300,000,000
Debt Instrument, Interest Rate, Stated Percentage												7.37%
Long-term Debt							2,116,045,087
Current portion of debt							288,082,711
Loans payable to bank							1,390,440,838	¥ 2,141,402,299
Loans payable to bank, current							241,775,211	186,571,525
Carrying amount of solar project sold									¥ 52,000,000.0		¥ 815,400,000		¥ 201,100,000
Short-term borrowings							9,047,249,911	7,103,399,191
Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	5.00%
Debt instrument, interest rate spread	5.00%
Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	9.00%
Debt instrument, interest rate spread	9.00%
Financings Associated With Failed Sale Lease Back Transactions [Member]
Debt Instrument [Line Items]
Long-term Debt							725,604,249
Current portion of debt							288,082,711
Carrying amount of solar project sold							1,055,200,000
Cash consideration for solar project sold	¥ 927,000,000.0
Short-term borrowings							140,055,814
Financings Associated With Failed Sale Lease Back Transactions [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Lease term	1 year
Financings Associated With Failed Sale Lease Back Transactions [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Lease term	6 years
Loan agreement with The Export-Import Bank of China [Member]
Debt Instrument [Line Items]
Debt, face amount							¥ 609,283,000
Effective interest rate					3.82%	3.82%	3.82%
Long-term Debt							¥ 69,881,000
China Merchants Bank [Member]
Debt Instrument [Line Items]
Debt term			10 years	10 years
Debt, face amount				¥ 87,880,000
Debt Instrument, Interest Rate, Stated Percentage				5.39%
Long-term Debt							59,631,212
Current portion of debt							8,378,198
Debt Instrument, Collateral Amount							168,753,985
Loan Agreement With Credit Suisse Ag [Member]
Debt Instrument [Line Items]
Debt term		3 years	3 years
Debt, face amount		$ 40,000,000	$ 6,000,000					¥ 279,048,000		¥ 41,857,200
Debt Instrument, Interest Rate, Stated Percentage		5.62%	5.62%					5.62%		5.62%
Consortium Loan one [Member]
Debt Instrument [Line Items]
Debt term	7 years	7 years
Debt instrument, description of variable rate basis		2% and LIBOR
Line of Credit Facility, Current Borrowing Capacity					$ 103,248,381	$ 162,564,059	780,163,451
Debt Instrument, Collateral Amount							1,043,516,591
Consortium Loan Two [Member]
Debt Instrument [Line Items]
Debt term		14 years
Debt, face amount		$ 105,185,805						¥ 733,797,213
Current portion of debt							25,158,813
Line of Credit Facility, Current Borrowing Capacity					73,288,241		511,273,426
Debt Instrument, Collateral Amount							926,590,039
Consortium Loan Three [Member]
Debt Instrument [Line Items]
Debt term		7 years
Debt instrument, description of variable rate basis		2% and LIBOR
Line of Credit Facility, Current Borrowing Capacity					$ 18,967,411	$ 7,328,535	135,019,993
Debt Instrument, Collateral Amount							240,524,789
Seven Year Loan Agreement [Member]
Debt Instrument [Line Items]
Debt, face amount		$ 19,596,403						¥ 136,708,427
Loan Agreement With China Everbright Bank [Member]
Debt Instrument [Line Items]
Debt term	8 years
Debt, face amount							¥ 372,000,000
Debt Instrument, Interest Rate, Stated Percentage					6.37%	6.37%	6.37%
Loans payable to bank							¥ 348,750,000
Loans payable to bank, current							46,500,000
Debt Instrument, Collateral Amount							706,173,643
Agreement With China CITIC Bank [Member]
Debt Instrument [Line Items]
Debt term	2 years
Debt, face amount							¥ 30,000,000
Debt Instrument, Interest Rate, Stated Percentage					8.50%	8.50%	8.50%
Guochuang Investment [Member]
Debt Instrument [Line Items]
Debt term			3 years
Debt, face amount										¥ 50,000,000