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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2017
INCOME TAXES [Abstract]  
Schedule of Income Tax Expenses
Income tax expenses comprise:
 
 
 
Year ended December 31,
 
 
 
2015
 
2016
 
2017
 
Current Tax Expenses
 
$
1,786,092
 
$
7,357,623
 
$
17,417,528
 
Deferred Tax Expenses (Benefit)
 
 
(648,271)
 
 
466
 
 
(85,302)
 
Total
 
$
1,137,821
 
$
7,358,089
 
$
17,332,226
 
Schedule of Deferred Tax Assets and Liabilities
The principal components of deferred income tax assets are as follows:
 
 
 
December 31,
 
 
 
2016
 
2017
 
Net operating loss carried forward
 
$
20,039,534
 
$
21,182,813
 
Allowance for doubtful accounts
 
 
1,524
 
 
1,998
 
Government grants related to assets
 
 
217,661
 
 
211,707
 
Long-lived assets impairment & depreciation
 
 
18,113,967
 
 
19,618,474
 
Others
 
 
942,466
 
 
1,015,525
 
Sub-total
 
 
39,315,152
 
 
42,030,517
 
Valuation Allowance
 
 
(38,729,208)
 
 
(41,316,449)
 
Total
 
$
585,944
 
$
714,068
 
Schedule of Changes of Valuation Allowance
The changes of valuation allowance are as follows:
  
 
 
Year ended December 31,
 
 
 
2015
 
2016
 
2017
 
Beginning balance
 
$
50,109,751
 
$
42,362,849
 
$
38,729,208
 
Reversal
 
 
(5,708,268)
 
 
(932,833)
 
 
(24,771)
 
Foreign exchange effect
 
 
(2,038,634)
 
 
(2,700,808)
 
 
2,612,012
 
Ending Balance
 
$
42,362,849
 
$
38,729,208
 
$
41,316,449
 
Schedule of Effective Income Tax Rate Reconciliation
The effective income tax rate of the Group is different from the expected PRC statutory rate as a result of the following items:
 
 
 
Year ended December 31,
 
 
 
2015
 
2016
 
2017
 
PRC Enterprise Income Tax
 
 
25
%
 
25
%
 
25
%
Preferential income tax rate of a subsidiary
 
 
(8)
%
 
(10)
%
 
(10)
%
 
 
 
 
 
 
 
 
 
 
 
Additional tax deductions
 
 
(12)
%
 
(1)
%
 
(1)
%
Different tax rate in other jurisdictions
 
 
8
%
 
1
%
 
2
%
Changes in valuation allowance
 
 
(3)
%
 
(1)
%
 
%
Tax credits
 
 
(3)
%
 
%
 
%
Withhold tax
 
 
1
%
 
%
 
%
Effective tax rate
 
 
8
%
 
14
%
 
16
%