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Deferred revenue and customer advances (Details)
¥ in Millions, $ in Millions
Mar. 31, 2019
USD ($)
Mar. 31, 2019
CNY (¥)
Mar. 31, 2018
CNY (¥)
Deferred revenue and customer advances      
Deferred revenue   ¥ 18,448 ¥ 13,350
Customer advances   13,814 9,940
Total   32,262 23,290
Less: current portion $ (4,589) (30,795) (22,297)
Non-current portion $ 219 ¥ 1,467 ¥ 993