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INVENTORIES
12 Months Ended
Dec. 31, 2022
INVENTORIES  
INVENTORIES

4. INVENTORIES

Inventories consist of the following:

December 31, 

    

2021

    

2022

Raw materials

$

108,925

$

59,780

Work-in-process

 

20,593

 

12,531

Finished goods

 

198,253

 

97,206

Total

$

327,771

$

169,517

Inventory write-down was $2.0 million, nil and nil for the years ended December 31, 2020, 2021 and 2022.