Inventories, Net - Schedule of Inventories (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Inventory Disclosure [Abstract]
Raw materials and packing materials	¥ 43,922		¥ 56,519
Products	759,832		581,237
Inventories	803,754		637,756
Less: impairment allowance	(107,993)		(20,948)
Inventories, net	¥ 695,761	$ 109,180	¥ 616,808

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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