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Convertible bonds (Tables)
12 Months Ended
Dec. 31, 2018
Convertible bonds [Abstract]  
Schedule of convertible bonds
 
 
 
December 31,
 
 
 
2017
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
 
 
 
 
 
 
Convertible bonds, current
 
 
 
 
 
 
 
 
2019 Convertible Senior Notes
 
 
-
 
 
 
6,863
 
 
 
 
 
 
 
 
 
 
Convertible bonds, non-current
 
 
 
 
 
 
 
 
2019 Convertible Senior Notes
 
 
6,536
 
 
 
-