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OTHER NON-CURRENT ASSETS (Tables)
 12 Months Ended
Dec. 31, 2019
OTHER NON-CURRENT ASSETS  
Schedule of other non-current assets

 

 

 

 

 

 

 

As of December 31, 

 

    

2018

    

2019

Rental deposits (1)

 

4,027

 

6,638

Prepayment for investments (2)

 

20,021

 

6,295

Prepayment for property, plant and equipment

 

 —

 

2,880

Others

 

 —

 

671

 

 

24,048

 

16,484