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Inventories, net (Details) ¥ in Millions, $ in Millions | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
--- | --- | --- | ---
Inventories |  |  |
Inventory, Gross | ¥ 77,900 |  | ¥ 60,925
Inventory valuation allowance | (2,299) |  | (1,992)
Inventories, net | 75,601 | $ 11,863 | 58,933
Products |  |  |
Inventories |  |  |
Inventory, Gross | 77,422 |  | 60,455
Packing materials and others |  |  |
Inventories |  |  |
Inventory, Gross | ¥ 478 |  | ¥ 470

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