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Inventories, net (Details)
¥ in Millions, $ in Millions
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Inventories      
Inventory, Gross ¥ 72,428   ¥ 82,064
Inventory valuation allowance (4,370)   (4,115)
Inventories, net 68,058 $ 9,586 77,949
Products      
Inventories      
Inventory, Gross 71,297   80,966
Packing materials and others      
Inventories      
Inventory, Gross ¥ 1,131   ¥ 1,098