Employee Benefit Expenses (Details) ¥ in Thousands, $ in Thousands	6 Months Ended
Jun. 30, 2025 CNY (¥)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 CNY (¥)
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Employee benefit expenses	¥ 1,292	$ 180	¥ 1,231

Amount of expense for employee benefit and equity-based compensation.

No definition available.

Name:	us-gaap_EmployeeBenefitsAndShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration