FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2015

FAIR VALUE MEASUREMENTS [Abstract]

Schedule of Investments Measured at Fair Value on Recurring Basis

	Fair Value Measurements at Reporting Date Using
Description	Balance as of December 31, 2013		Quote prices in active market for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets:
Foreign exchange forward contracts		43,160,093		-		43,160,093		-
Capped call options		107,223,601		-		-		107,223,601
Available-for-sale investment		30,117,797		-		-		30,117,797
Liabilities:
Foreign exchange forward contracts		10,080,395		-		10,080,395		-
Convertible senior notes		770,485,897		-		-		770,485,897

	Fair Value Measurements at Reporting Date Using
Description	Balance as of December 31, 2014		Quote prices in active market for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets:
Foreign exchange forward contracts		47,712,744		-		47,712,744		-
Capped call options		21,098,263		-		-		21,098,263
Available-for-sale investment		20,875,725		-		-		20,875,725
Liabilities:
Foreign exchange forward contracts		30,901,012		-		30,901,012		-
Convertible senior notes		1,540,398,645		-		-		1,540,398,645

	Fair Value Measurements at Reporting Date Using
Description	Balance as of December 31, 2015		Quote prices in active market for identical assets (Level 1)	Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets:
Call spread option		7,277,406					7,277,406
Foreign exchange forward contracts		7,038,537			7,038,537
Capped call options		17,490,323					17,490,323
Available-for-sale investment		-					-
Liabilities:
Foreign exchange forward contracts		4,295,737			4,295,737
Convertible senior notes		1,506,981,361					1,506,981,361
Warrant Liability		68,377,608					68,377,608

Schedule of Reconciliation of Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs

	For the year ended December 31,
	2013			2014			2015
	RMB			RMB			RMB
Balance at January 1,		483,581,668			770,485,897			1,540,398,645
Issuance of convertible senior notes		-			914,850,000			-
Foreign exchange (gain)/loss		(18,298,249	)		5,853,455			96,678,461
Change in fair value of convertible senior notes		305,202,478			(150,790,707	)		8,400,918
Repurchase of convertible senior notes		-			-			(138,496,663	)
Balance at December 31,		770,485,897			1,540,398,645			1,506,981,361

	For the year ended December 31,
	2013			2014			2015
	RMB			RMB			RMB
Balance at January 1,		16,131,208			107,223,601			21,098,263
Foreign exchange (gain)/loss		(1,203,512	)		563,725			2,562,342
Change in fair value of capped call options		92,295,905			(86,689,063	)		(6,170,282	)
Balance at December 31,		107,223,601			21,098,263			17,490,323

	For the year ended December 31,
	2013		2014			2015
	RMB		RMB			RMB
Balance at January 1,		-		30,117,797			20,875,725
Receipt of available-for-sale investment		23,730,486		-
Foreign exchange gain/(loss)		344,877		(3,446,112	)
Change in fair value of available-for-sale		6,042,434		(5,795,960	)		-
Transfer to receivable (Note 2 (g))		-		-			(20,875,725	)
Balance at December 31,		30,117,797		20,875,725			-

Schedule of assumptions used in the valuation of financial instruments

	As of December 31,
	2013			2014			2015
Fair value of ADS	US$	29.30		US$	19.71		US$	27.67
Strike price	US$	33.75		US$	33.75		US$	33.75
Risk free interest rate		0.53	%		0.44	%		0.52	%
Dividend yield		-			-			-
Standard volatility		70.6	%		64.31	%		46.14	%

	As of December 31,
	2013		2014			2015
Fair value of ADS		-	US$	19.71		US$	27.67
Strike price		-	US$	45.83		US$	45.83
Risk free interest rate		-		1.51	%		1.47	%
Dividend yield		-		-			-
Standard volatility		-		66.31	%		40.44	%

Schedule of fair value of call spread option contracts

	2015
Expected volatility		4.389%-8.078	%
Expected terms		0.24-0.63	%
USD Risk-free interest rate		0.16%-0.53	%
RMB Risk-free interest rate		2.24%-2.28	%

Schedule of changes in fair value of derivative liability

	For the year ended December 31, 2015
	RMB
Balance at January 1,		-
Purchase of call spread		7,647,843
Change in fair value of call spread		(370,437	)
Balance at December 31,		7,277,406

Schedule of fair value of warrant liability

	As of December 31, 2015
	IPO Senario			Non-IPO Senario
Expected volatility		62.06	%		N/A
Expected terms		1.03			1.03
Dividend yield		-			N/A
Risk-free interest rate		0.72	%		N/A
Fair value of warrants at December 31,2015 (USD)					10.53 million

Schedule of changes in fair value of warrant liability

	For the year ended December 31, 2015
	RMB
Balance at January 1,		-
Issuance of warrant liability		62,331,211
Foreign exchange loss on warrant liability		3,950,373
Change in fair value of warrant liability		2,096,024
Balance at December 31,		68,377,608

Schedule of Change in Fair Value of Derivatives

	For the year ended December 31,
	2013			2014			2015
	RMB			RMB			RMB
Foreign exchange forward contracts-realized		22,750,277			15,553,224			71,000,875
Foreign exchange forward contracts-unrealized		25,640,169			(16,267,966	)		(14,068,932	)
Call spread options		-			-			(370,437	)
Convertible senior notes		(305,202,478	)		150,790,707			(8,400,918	)
Capped call options		92,295,905			(86,689,063	)		(6,170,282	)
Warrant liability		-			-			(2,096,024	)
Total		(164,516,127	)		63,386,902			39,894,282

As of December 31, 2013

	Fair Value Measurements at Reporting Date Using
Description	Balance as of December 31, 2013		Quote Prices in active market for identical assets (Level 1)	Significant other observable input (Level 2)	Significant unobservable input (Leval 3)		Total (losses)
	RMB		RMB	RMB	RMB
Property, plant and equipment, net		3,186,997,950				3,186,997,950		3,573,248

As of December 31, 2014

	Fair Value Measurements at Reporting Date Using
Description	Balance as of December 31, 2014		Quote Prices in active market for identical assets (Level 1)	Significant other observable input (Level 2)	Significant unobservable input (Leval 3)		Total (losses)
	RMB		RMB	RMB	RMB
Property, plant and equipment, net		3,101,795,172				3,101,795,172		6,217,151