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Unsecured senior notes (Tables)
12 Months Ended
Dec. 31, 2019
Unsecured senior notes  
Schedule of unsecured senior notes
                                 
 
As of December 31,
 
 
Effective
interest rate
 
 
2017
 
 
2018
 
 
2019
 
 
RMB
 
 
RMB
 
 
RMB
 
 
 
US$500,000 3.125% notes due 2021
 
 
3,242,565
 
 
 
3,413,264
 
 
 
3,477,276
 
 
 
3.37
%
US$500,000 3.875% notes due 2026
 
 
3,204,792
 
 
 
3,372,879
 
 
 
3,435,216
 
 
 
4.15
%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Carrying value
 
 
6,447,357
 
 
 
6,786,143
 
 
 
6,912,492
 
 
 
 
Unamortized discount and debt issuance costs
 
 
86,843
 
 
 
77,057
 
 
 
63,708
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total principal amounts of unsecured senior notes
 
 
6,534,200
 
 
 
6,863,200
 
 
 
6,976,200