Leases - Schedule of Operating Leases (Details) ¥ in Thousands, $ in Thousands	Jun. 30, 2025 CNY (¥)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Schedule of Operating Leases [Abstract]
Operating lease right-of-use assets, net	¥ 12,003	$ 1,676	¥ 16,205
Operating lease liabilities, current	981	137	1,843
Operating lease liabilities, non-current	¥ 2,933	$ 409	¥ 4,137
Weighted average remaining lease terms	2 years 8 months 19 days	2 years 8 months 19 days	3 years 2 months 19 days
Weighted average discount rate	3.95%	3.95%	4.64%

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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-Topic 842
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-Name Accounting Standards Codification
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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
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