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Business acquisition - Summary of purchase price as of the date of jiangsu five star acquisition (Detail) - Jiangsu Five Star [Member] - CNY (¥) ¥ in Millions |  | 1 Months Ended
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Apr. 30, 2020 | Apr. 30, 2019
Summary of purchase price as of the date of acquisition [Line Items] |  |
Conversion of loan and assuming of debt | ¥ 1,025 | ¥ 1,025
Fair value of previously held equity interests | 1,274 |
Total | ¥ 2,299 |

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- Definition Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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