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Unsecured senior notes- Maturity schedule (Details) - Unsecured senior notes
¥ in Millions, $ in Millions
Sep. 30, 2020
CNY (¥)
Sep. 30, 2020
USD ($)
Mar. 31, 2020
CNY (¥)
Future principal payments      
Between 1 to 2 years ¥ 10,217    
Between 2 to 3 years 4,768    
Between 4 to 5 years 15,325    
Thereafter 47,677    
Total principal amount 77,987   ¥ 81,166
Level 2      
Unsecured senior notes      
Fair value ¥ 89,960 $ 13,208