v2.4.0.6
Reconciliation of Differences Between Statutory Tax Rate and Effective Tax Rate for CIT (Detail)
12 Months Ended
Dec. 31, 2011
USD ($)
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2009
CNY
Reconciliation of Provision of Income Taxes [Line Items]        
Expected taxation at PRC CIT statutory rate of 25% $ 50,326,193 316,748,023 224,398,887 236,019,816
Favorable tax rate (20,690,956) (130,226,808) (25,488,282) (49,059,531)
Tax holiday (2,016,982) (12,694,680) (105,110,278) (71,351,432)
Non-deductible expenses (non-taxable income), net 620,323 3,904,248 7,679,477 (4,718,414)
Additional 50% tax deduction for qualified research and development expenses (3,008,621) (18,935,961) (15,257,615) (10,380,859)
Tax exempted VAT refund       (12,779,323)
Change in valuation allowance 458,446 2,885,413    
Deferred tax benefits on future tax rate difference (9,347,680) (58,833,362) (3,659,750) (2,670,247)
One-time withholding tax accrual for dividend 41,217,035 259,415,894    
Provision-to-return adjustment (1,570,497) (9,884,546) 6,759,963  
Taxation for the year $ 55,987,261 352,378,221 89,322,402 85,060,010