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Transaction with JD.com, Inc. (Tables)
12 Months Ended
Dec. 31, 2015
Transaction with JD.com, Inc. [Abstract]  
Summary of the fair value about acquired intangible assets
    Amount     Estimated useful lives
Exclusive operation right of leisure travel channel     405,406     5 years
Preferred partnership of hotel and air ticket reservation service     1,431     5 years
Internet traffic support     139,358     5 years
Marketing support     114,020     5 years
Total consideration     660,215