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Accounts Receivable
12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Accounts Receivable

6. Accounts Receivable

 

Accounts receivable is consisted of the following:

 

    December 31,     December 31,  
    2017     2016  
Accounts receivable, gross   $ 26,965,731     $ 12,350,947  
Less: allowance for doubtful accounts     (3,646 )     (2,828,796 )
Accounts receivable, net   $ 26,962,085     $ 9,522,151  

 

The movement of the allowance for doubtful accounts is as follows:

 

    December 31,
2017
    December 31,
2016
 
Balance at the beginning of the year   $ (2,828,796 )   $ -  
Additions charged to bad debt expense     (145,512 )     (2,825,124 )
Write-off of bad debt allowance     89,851       -  
Disposal of Zhong Hai Shi Xun     2,880,811       -  
Acquisition of WAG     -       (3,672 )
Balance at the end of the year   $ (3,646 )   $ (2,828,796 )