LEASES (Tables)

12 Months Ended

Dec. 31, 2025

LEASES

Schedule of items related to operating leases in consolidated balance sheets

	December 31, 2024	December 31, 2025	December 31, 2025
	RMB	RMB	US$
	(in thousands)		(Note 3)
Operating lease right-of-use assets	4,283	11,836	1,693
Operating lease liabilities-current portion	2,841	4,189	599
Operating lease liabilities-non-current portion	1,604	7,815	1,118

Schedule of lease cost

	Classification in Consolidated
	Statements of Operations
	and Comprehensive
	Income (Loss)	December 31, 2023	December 31, 2024	December 31, 2025	December 31, 2025
		RMB	RMB	RMB	US$
			(in thousands)		(Note 3)
Operating lease cost	Operating expenses	5,428	4,602	4,854	694
Cost of other leases with terms less than one year	Operating expenses	80	85	211	30
Total		5,508	4,687	5,065	724

Schedule of maturities of operating lease liabilities

	December 31, 2024	December 31, 2025	December 31, 2025
	RMB	RMB	US$
	(in thousands)		(Note 3)
Due within one year	2,969	4,659	666
Due in the second year	444	4,670	668
Due in the third year	455	3,091	442
Due in the fourth year	466	415	60
Due in the fifth year	415	—	—
Total lease payments	4,749	12,835	1,836
Less: imputed interest	(304)	(831)	(119)
Total	4,445	12,004	1,717

Summary of weighted average remaining lease term and discount rate for the Group's operating leases

	2024		2025
Weighted average remaining lease term (in years)	1.99		2.95
Weighted average discount rate	4.65	%	4.65	%

Schedule of supplemental cash flow information related to operating leases

	December 31, 2023	December 31, 2024	December 31, 2025	December 31, 2025
	RMB	RMB	RMB	US$
	(in thousands)			(Note 3)
Cash paid for amounts included in the measurement of operating lease liabilities	6,196	4,817	4,884	698