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Other comprehensive income (Tables)
9 Months Ended
Sep. 30, 2019
Other comprehensive income/(loss)  
Schedule of changes in the composition of accumulated other comprehensive income attributable to ordinary shareholders
 
Foreign currency
translation
adjustments
 
 
Net unrealized
gains/(losses) on
available-for-sale

securities
 
 
Total
 
 
RMB
 
 
RMB
 
 
RMB
 
Balances as of January 1, 2018
   
661,685
     
1,180,396
     
1,842,081
 
Cumulative effect of changes in accounting principles related to financial instruments
   
—  
     
(1,156,642
)    
(1,156,642
)
Other comprehensive income/(loss)
   
2,768,935
     
(21,076
)    
2,747,859
 
                         
Balances as of September 30, 2018
   
3,430,620
     
2,678
     
3,433,298
 
Balances as of January 1, 2019
   
3,358,469
     
627
     
3,359,096
 
Other comprehensive income
   
1,523,784
     
37,583
     
1,561,367
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balances as of September 30, 2019
   
4,882,253
     
38,210
     
4,920,463