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Taxation - Summary of Current and Deferred Portion of Income Tax Expenses Included in Consolidated Statements of Operations and Comprehensive Loss (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Income Tax Disclosure [Abstract] |  |  |  |
Current tax expenses | ¥ 1,124 |  | ¥ 43 |
Deferred tax benefits | (43,654) |  | (111,826) | ¥ (143,863)
Total income tax benefits | ¥ (42,530) | $ (5,990) | ¥ (111,783) | ¥ (143,863)

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