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Intangible assets, Net
 12 Months Ended
Dec. 31, 2016
Intangible assets, Net [Abstract]  
Intangible assets, Net
7. Intangible assets, Net
 
Intangible assets, net, consist of the following:
 
 
 
As of December 31,
 
 
 
2015
 
2016
 
 
 
RMB
 
RMB
 
 
 
 
 
 
 
Internally developed software
 
 
33,624
 
 
49,426
 
Trademark
 
 
685
 
 
960
 
 
 
 
 
 
 
 
 
Accumulated amortization
 
 
(14,181)
 
 
(23,402)
 
 
 
 
 
 
 
 
 
Intangible assets, net
 
 
20,128
 
 
26,984
 
 
Amortization expenses for intangible assets were RMB4,542, RMB6,532 and RMB9,221 for the years ended December 31, 2014, 2015 and 2016, respectively. Estimated amortization expenses of the existing intangible assets for the next five years are RMB12,106, RMB9,012, RMB5,353, RMB86 and RMB83.