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Short-Term Investments (Tables)
12 Months Ended
Dec. 31, 2022
Short-Term Investments [Abstract]  
Schedule of Short-term investments

Short-term investments consisted of the following:

 

 

As of December 31,

 

 

2021

 

 

2022

 

 

US$

 

 

US$

 

Aggregate cost

 

 

2,764,244

 

 

 

25,547,079

 

Gross unrealized gain

 

 

142,100

 

 

 

241,225

 

Aggregate fair value

 

 

2,906,344

 

 

 

25,788,304