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Short-term deposits (Tables)
12 Months Ended
Dec. 31, 2016
Short-term deposits [Abstract]  
Schedule of short-term deposits
 
 
December 31, 2015
 
December 31, 2016
 
 
 
 
 
RMB
 
 
 
RMB
 
 
 
Amount
 
equivalent
 
Amount
 
equivalent
 
 
 
 
 
 
 
 
 
 
 
RMB
 
 
250,000
 
 
250,000
 
 
1,235,000
 
 
1,235,000
 
US$
 
 
253,322
 
 
1,644,946
 
 
362,882
 
 
2,516,519
 
Total
 
 
 
 
 
1,894,946
 
 
 
 
 
3,751,519