PROPERTY AND EQUIPMENT, NET (Details)
12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2013
Company excluding Shanghai JNet
USD ($)
Dec. 31, 2013
Company excluding Shanghai JNet
CNY
Dec. 31, 2012
Company excluding Shanghai JNet
CNY
Dec. 31, 2011
Company excluding Shanghai JNet
CNY
Dec. 31, 2013
Company excluding Shanghai JNet
Cost of revenue
USD ($)
Dec. 31, 2013
Company excluding Shanghai JNet
Cost of revenue
CNY
Dec. 31, 2012
Company excluding Shanghai JNet
Cost of revenue
CNY
Dec. 31, 2011
Company excluding Shanghai JNet
Cost of revenue
CNY
Dec. 31, 2013
Company excluding Shanghai JNet
Sales and marketing expenses
USD ($)
Dec. 31, 2013
Company excluding Shanghai JNet
Sales and marketing expenses
CNY
Dec. 31, 2012
Company excluding Shanghai JNet
Sales and marketing expenses
CNY
Dec. 31, 2011
Company excluding Shanghai JNet
Sales and marketing expenses
CNY
Dec. 31, 2013
Company excluding Shanghai JNet
General and administrative expenses
USD ($)
Dec. 31, 2013
Company excluding Shanghai JNet
General and administrative expenses
CNY
Dec. 31, 2012
Company excluding Shanghai JNet
General and administrative expenses
CNY
Dec. 31, 2011
Company excluding Shanghai JNet
General and administrative expenses
CNY
Dec. 31, 2013
Company excluding Shanghai JNet
Research and development expenses
USD ($)
Dec. 31, 2013
Company excluding Shanghai JNet
Research and development expenses
CNY
Dec. 31, 2012
Company excluding Shanghai JNet
Research and development expenses
CNY
Dec. 31, 2011
Company excluding Shanghai JNet
Research and development expenses
CNY
Dec. 31, 2013
Optical fibers
USD ($)
Dec. 31, 2013
Optical fibers
CNY
Dec. 31, 2012
Optical fibers
CNY
Dec. 31, 2013
Computer equipment
USD ($)
Dec. 31, 2013
Computer equipment
CNY
Dec. 31, 2012
Computer equipment
CNY
Dec. 31, 2013
Furniture and fixtures
USD ($)
Dec. 31, 2013
Furniture and fixtures
CNY
Dec. 31, 2012
Furniture and fixtures
CNY
Dec. 31, 2013
Leasehold improvements
USD ($)
Dec. 31, 2013
Leasehold improvements
CNY
Dec. 31, 2012
Leasehold improvements
CNY
Dec. 31, 2013
Motor vehicles
USD ($)
Dec. 31, 2013
Motor vehicles
CNY
Dec. 31, 2012
Motor vehicles
CNY
PROPERTY AND EQUIPMENT, NET                                                                              
Property and equipment, at cost $ 92,897,000 562,364,000 465,151,000                                           $ 2,164,000 13,100,000 13,100,000 $ 84,918,000 514,059,000 424,808,000 $ 1,517,000 9,185,000 7,538,000 $ 3,258,000 19,725,000 15,499,000 $ 1,040,000 6,295,000 4,206,000
Less: accumulated depreciation (53,135,000) (321,662,000) (285,860,000)                                                                        
Less: accumulated impairment (9,000) (52,000) (52,000)                                                                        
Property and equipment, net 39,753,000 240,650,000 179,239,000                                                                        
Depreciation expenses $ 9,891,000 59,876,000 59,890,000 67,351,000 $ 9,891,000 59,876,000 59,890,000 67,345,000 $ 7,529,000 45,581,000 51,911,000 63,318,000 $ 46,000 280,000 712,000 855,000 $ 943,000 5,706,000 1,171,000 1,073,000 $ 1,373,000 8,309,000 6,096,000 2,099,000