CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
 12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Net revenues        
-Third party customers $ 182,243,000 1,103,243,000 801,189,000 618,422,000
-A related party customer     12,543,000  
Net revenues 182,243,000 1,103,243,000 813,732,000 618,422,000
Cost of revenues (124,984,000) (756,617,000) (559,460,000) (432,736,000)
Gross profit 57,259,000 346,626,000 254,272,000 185,686,000
Sales and marketing expenses (20,579,000) (124,578,000) (87,597,000) (72,040,000)
General and administrative expenses (including provision for doubtful accounts of RMB2,786, RMB22,736 and RMB23,722 (US$3,918) for the years ended December 31, 2011, 2012 and 2013) (25,368,000) (153,568,000) (106,115,000) (57,308,000)
Research and development expenses (16,965,000) (102,704,000) (68,523,000) (40,952,000)
Impairment of an available-for-sale investment 201,000 1,217,000 0 0
Post-acquisition settlement consideration       (7,158,000)
Operating income/ (loss) (5,854,000) (35,441,000) (7,963,000) 8,228,000
Interest income 415,000 2,513,000 1,844,000 2,233,000
Interest expense (592,000) (3,584,000) (1,340,000) (1,254,000)
Other (expenses)/ income 1,137,000 6,886,000 (1,758,000) (5,165,000)
Foreign exchange loss (546,000) (3,308,000) (1,481,000) (4,411,000)
Loss from continuing operations before income taxes (5,440,000) (32,934,000) (10,698,000) (369,000)
Income tax expense (214,000) (1,295,000) (6,293,000) (11,145,000)
Net loss from continuing operations (5,654,000) (34,229,000) (16,991,000) (11,514,000)
Income from discontinued operations       31,977,000
Net income/ (loss) (5,654,000) (34,229,000) (16,991,000) 20,463,000
Foreign currency translation (326,000) (1,975,000) 29,000 773,000
Unrealized holding gain on available-for-sale investments 301,000 1,821,000 1,594,000 90,000
Amounts reclassified from accumulated other comprehensive income (316,000) (1,912,000) (224,000)  
Total other comprehensive income (loss), net of tax (341,000) (2,066,000) 1,399,000 863,000
Comprehensive income/ (loss) $ (5,995,000) (36,295,000) (15,592,000) 21,326,000
Earnings/ (loss) per share        
Net loss from continuing operations (in CNY or dollars per share) $ (0.01) (0.09) (0.05) (0.03)
Income from discontinued operations (in CNY or dollars per share)       0.08
Basic (in CNY or dollars per share) $ (0.01) (0.09) (0.05) 0.05
Net loss from continuing operations (in CNY or dollars per share) $ (0.01) (0.09) (0.05) (0.03)
Income from discontinued operations (in CNY or dollars per share)       0.08
Diluted (in CNY or dollars per share) $ (0.01) (0.09) (0.05) 0.05
Shares used in earnings/ (loss) per share computations:        
Basic (in shares) 362,916,540 362,916,540 363,780,875 381,984,517
Diluted (in shares) 362,916,540 362,916,540 363,780,875 381,984,517