Intangible Assets, Net
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
Intangible asset is comprised of following:
As of December 31,
20192020
(US$)
Cost: Developed technology (Note 3)
$— $212,824 
Less: Accumulated amortization
— (3,547)
Intangible assets, net$— $209,277 

Amortization expense recognized for the year ended December 31, 2020 is recorded in general and administrative expenses. The Company will record estimated amortization expenses of US$42,565, US$42,565, US$42,565, US$42,565 and US$39,018 for the years ending December 31, 2021, 2022, 2023, 2024 and 2025, respectively.