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Fair value measurements (Tables)
12 Months Ended
Dec. 31, 2016
Fair value measurements [Abstract]  
Summary of liabilities measured at fair value on recurring basis
 
 
As of December 31, 2015
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale securities
 
 
-
 
 
-
 
 
6,117
 
 
6,117
 
 
 
 
As of December 31, 2016
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale securities
 
 
182,480
 
 
-
 
 
6,117
 
 
188,597
 
Schedule of changes in level 3 instruments
 
Contingent consideration in
 
 
relation to business
 
 
acquisitions
 
 
RMB
 
 
 
 
Balance as of December 31, 2014
 
183,000
 
Acquisition of Beifu in 2015 (Note 4)
 
107,306
 
Fair value change of contingent consideration in 2015
 
(290,306)
 
Balance as of December 31, 2015 and 2016
 
-
 
Schedule of valuation techniques used to discount the contingent consideration
Initial recognition of contingent consideration in relation to 
business acquisitions
 
Risk free interest rate
 
Discount rate
 
Acquisition of Beifu
 
 
3.81
%
 
18
%