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PREPAID EXPENSE AND OTHER CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2019
PREPAID EXPENSE AND OTHER CURRENT ASSETS  
Schedule of Prepaid Expense and Other Current Assets

Prepaid expense and other current assets consist of the following:

 

 

 

 

 

 

 

 

 

December 31, 

 

    

2018

    

2019

Spare parts

 

$

5,011,781

 

$

2,912,745

Prepaid value added tax (“VAT”)

 

 

4,768,552

 

 

11,525,475

Prepaid insurance fee

 

 

153,751

 

 

260,395

Others

 

 

401,417

 

 

645,056

Total

 

$

10,335,501

 

$

15,343,671