Concentration and Risks - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Concentration Risk [Line Items]
Revenue	¥ 5,303,835	$ 832,288	¥ 5,825,624	¥ 4,647,513
Contract With Xiaomi \| Viomi-branded Products
Concentration Risk [Line Items]
Revenue	¥ 274,452		¥ 326,114	¥ 250,593

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details