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Prepaid Expenses and Other Assets - Schedule of Prepaid Expenses and Other Assets (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
--- | --- | --- | ---
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |  |
Advances to suppliers | ¥ 106,666 |  | ¥ 66,421
Other receivables | 48,322 |  | 17,732
Prepayment for equipment | 18,493 |  | 13,870
Lease hold improvement | 6,643 |  | 4,735
Expected return assets | 3,189 |  | 4,106
Other current assets | 135 |  | 219
Total | 183,448 |  | 107,083
Less: non-current portion | (27,321) | $ (4,287) | (19,803)
Prepaid expenses and other current assets | ¥ 156,127 | $ 24,500 | ¥ 87,280

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