Property and Equipment - Schedule of Property and Equipment, Net (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)
Property and Equipment
Less: Accumulated depreciation	¥ (8,629)	$ (1,183)	¥ (22,117)
Total property and equipment, net	8,847	1,212	14,635
Vehicles
Property and Equipment
Property, Plant and Equipment, Gross	11,647	1,596	30,902
Electronic equipment
Property and Equipment
Property, Plant and Equipment, Gross	4,931	676	4,951
Leasehold improvement
Property and Equipment
Property, Plant and Equipment, Gross	417	57	417
Furniture
Property and Equipment
Property, Plant and Equipment, Gross	¥ 481	$ 66	¥ 482

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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