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Intangible Assets, net
12 Months Ended
Dec. 31, 2025
Intangible Assets, net  
Intangible Assets, net

6.Intangible Assets, net

Intangible assets, net consisted of the following:

As of December 31, 

  ​ ​ ​

2024

  ​ ​ ​

2025

US$

US$

Purchased software

534,428

461,269

Less: Accumulated amortization

(534,428)

(461,269)

Intangible Assets, net

Amortization expense of intangible assets for the years ended December 31, 2023, 2024 and 2025 amounted to US$73,151, US$15,589 and nil, respectively. Estimated amortization expenses of the existing intangible assets for each of the five years ending December 31, 2030, and thereafter are expected to be nil.