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Total Share-Based Compensation Cost Recognized (Detail)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
USD ($)
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2009
CNY
Dec. 31, 2011
Cost of Sales
USD ($)
Dec. 31, 2011
Cost of Sales
CNY
Dec. 31, 2010
Cost of Sales
CNY
Dec. 31, 2009
Cost of Sales
CNY
Dec. 31, 2011
Selling, General and Administrative Expense
USD ($)
Dec. 31, 2011
Selling, General and Administrative Expense
CNY
Dec. 31, 2010
Selling, General and Administrative Expense
CNY
Dec. 31, 2009
Selling, General and Administrative Expense
CNY
Dec. 31, 2011
Research and Development Expense
USD ($)
Dec. 31, 2011
Research and Development Expense
CNY
Dec. 31, 2010
Research and Development Expense
CNY
Dec. 31, 2009
Research and Development Expense
CNY
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                                
Share-based compensation $ 24,155 152,028 93,736 86,318 $ 1,196 7,527 6,302 6,374 $ 7,946 50,012 36,811 38,681 $ 15,013 94,489 50,623 41,263
Recognized as part of internal-used software 270 1,700 226 1,217                        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost $ 24,425 153,728 93,962 87,535