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Business acquisition - Schedule of allocation of the purchase price as of the date of kuayue express acquisition (Detail)
$ in Thousands
12 Months Ended
Aug. 31, 2020
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Summary of purchase price as of the date of acquisition is comprised [Line Items]      
Issuance of ordinary shares of Jingdong Express   ¥ 115,856,000 $ 17,756
Kuayue Express [Member]      
Summary of purchase price as of the date of acquisition is comprised [Line Items]      
Cash ¥ 2,850,000,000    
Issuance of ordinary shares of Jingdong Express 115,856,000    
Total ¥ 2,965,856,000