Prepayment and Other Assets, Net (Tables)

12 Months Ended

Dec. 31, 2025

Prepaid Expense and Other Assets [Abstract]

Schedule of Prepayments and Other Assets

Prepayments and other assets consisted of the following:

		As of
		December 31, 2024				December 31, 2025
		RMB				RMB				US$
Security deposit			2,660				2,515				358
Prepaid advertising and promotion expenses⁽ⁱ⁾			-				9,091				1,300
Prepaid financial consulting expenses⁽ⁱ⁾			-				13,986				2,000
Prepaid legal expenses			-				315				45
Technology transfer license fee			18,100				7,000				1,001
Others			1,485				26				5
Prepayments and other assets			22,245				32,933				4,709
Less: other receivable- a related party			(738	)			-				-
Less: long-term prepayments			(18,698	)			(7,014	)			(1,003	)
Less: allowance for credit losses			(183	)			(252	)			(36	)
Prepayments and other current assets, net			2,626				25,667				3,670

(i)

As the business was not carried out, these prepaid expenses were fully refunded on April 24, 2026.

Schedule of Allowance for Credit Losses

An analysis of the allowance for credit losses was as follows:

		As of December 31,
		2024				2025
		RMB				RMB				US$
Balance at beginning of the year			(223	)			(183	)			(26	)
Reversal (provision)			40				(69	)			(10	)
Balance at the end of the year			(183	)			(252	)			(36	)