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Convertible redeemable non-controlling interests (Details) ¥ in Thousands, $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Sep. 30, 2019 USD ($)
Series A Preferred Shares |  |  |
Temporary Equity |  |  |
Issuance of preferred shares | ¥ | ¥ 15,629,605 |  |
Minimum offering value on fully diluted basis |  |  | $ 20,000,000
Jingdong Express |  |  |
Temporary Equity |  |  |
Ownership percentage, on a fully-diluted (as a percentage) |  | 19.00% |
Jingdong Express | Series A Preferred Shares |  |  |
Temporary Equity |  |  |
Issuance of preferred shares |  | $ 2,510,000 |

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