The following tables present the Company’s intangible assets with definite lives as of the respective balance sheet dates:


	December 31, 2025
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
	RMB		RMB			RMB		US$
	(in thousands)
Technologies		202,100		(202,100	)		—		—
Trademarks		175,308		(121,828	)		53,480		7,648
Database		73,500		(73,500	)		—		—
Customer relationship		46,900		(46,900	)		—		—
Domain names		3,044		(2,861	)		183		26
Licensing agreements		2,716		(2,710	)		6		1
		503,568		(449,899	)		53,669		7,675


	December 31, 2024
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
	RMB		RMB			RMB
	(in thousands)
Technologies		202,100		(161,680	)		40,420
Trademarks		175,308		(111,138	)		64,170
Database		73,500		(58,800	)		14,700
Customer relationship		46,900		(38,640	)		8,260
Domain names		3,050		(2,797	)		253
Licensing agreements		2,784		(2,770	)		14
		503,642		(375,825	)		127,817

The Company acquired TTP on December 31, 2020 and identified the intangible assets of technologies, trademarks, customer relationship and database. The intangible assets are amortized using the straight-line method, which is the Company’s best estimate of how these assets will be economically consumed over their respective estimated useful lives ranging from approximately 2 to 15 years. Amortization expense was RMB76.69 million, RMB74.34 million and RMB74.15 million (US$10.60 million) for the years ended December 31, 2023, 2024 and 2025, respectively.

The annual estimated amortization expenses for the acquired intangible assets for each of the next five years are as follows:


	2026		2027		2028		2029		2030
	RMB		RMB		RMB		RMB		RMB
	(in thousands)
Amortization expenses		10,738		10,733		10,729		10,729		10,729