Accounts Receivable

12 Months Ended

Dec. 31, 2025

Accounts Receivable [Abstract]

ACCOUNTS RECEIVABLE

5. ACCOUNTS RECEIVABLE

Accounts receivable and the allowance for expected credit loss consisted of the following:

	As of December 31,
	2024			2025
	RMB			RMB			US$
Accounts receivable		11,975			25,146			3,578
Less: allowance for expected credit loss		(1,601	)		(2,948	)		(420	)
		10,374			22,198			3,158

As of December 31, 2024 and 2025, all accounts receivable were due from third-party customers. There is RMB1,601 and RMB2,948 (US$420) allowance for expected credit loss recognized as of the years ended December 31, 2024 and 2025, respectively.

The movement of allowance of expected credit loss was as follows:

	As of December 31,
	2024			2025
	RMB			RMB			US$
At the beginning of the year		(37	)		(1,601	)		(219	)
Additions		(1,564	)		(1,347	)		(201	)
At the end of the year		(1,601	)		(2,948	)		(420	)