Intangible assets, net (Tables)

12 Months Ended

Dec. 31, 2012

Intangible assets, net [Abstract]

Schedule of Components of Intangible Assets

December 31,
	2011			2012			2012
	(RMB)			(RMB)			($)
Production license		28,779,986			28,779,986			4,578,790
Accumulated amortization		(11,478,729	)		(15,304,972	)		(2,434,965	)
Intangible assets, net		17,301,257			13,475,014			2,143,825

Schedule of Future Amortization of Intangible Assets

Years Ending December 31,	(RMB) Amount
2013		3,826,243
2014		3,826,243
2015		3,826,243
2016		1,996,285
Total		13,475,014