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Inventories
12 Months Ended
Dec. 31, 2023
Inventories [Abstract]  
Inventories

5. Inventories

 

Inventories as of December 31, 2022 and 2023 consisted of the following:

 

   December 31,   December 31, 
   2022   2023 
Raw materials  $7,101,426   $3,779,414 
Work in progress   17,274,033    9,525,568 
Finished goods   25,070,832    20,108,440 
   $49,446,291   $33,413,422 

 

During the years ended December 31, 2022 and 2023 write-downs of obsolete inventories to lower of cost or net realizable value of $1,658,432 and $3,554,962, respectively, were charged to cost of revenues.