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Income Tax Expenses - Schedule of Deferred Tax Assets (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Net operating loss carry forwards | ¥ 664,985 | ¥ 578,992
Inventory valuation allowance | 16,752 | 26,187
Accrued expenses and others | 26,389 | 29,150
Total deferred tax assets | 708,126 | 634,329
Less: valuation allowance | (706,751) | (632,378)
Deferred tax assets, net | ¥ 1,375 | ¥ 1,951

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