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Risks and contingencies (Details) - CNY (¥) ¥ in Millions | 6 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
Collectability of payments made relating to trade assurance program |  |
Risks and contingencies |  |
Provisions made in relation to the program | ¥ 0 | ¥ 0

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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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- Details
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