ALLOWANCES FOR DOUBTFUL RECEIVABLES AND ADVANCES (Tables)

12 Months Ended

Dec. 31, 2016

Allowances for accounts receivable [Member]

ALLOWANCE [Line Items]

Schedule of allowances

	At December 31,
	2014		2015		2016
Beginning of the year	$	4,869,942	$	7,638,434	$	5,152,466
Allowances made during the year		9,526,878		2,516,554		1,540,047
Reversals made during the year		(4,090,855)		(2,943,154)		(2,401,464)
Write off		(2,371,420)		(1,847,631)		(1,493)
Foreign exchange effect		(296,111)		(211,737)		(208,053)
Closing balance	$	7,638,434	$	5,152,466	$	4,081,503

Allowances for other receivables [Member]

ALLOWANCE [Line Items]

Schedule of allowances

	At December 31,
	2014		2015		2016
Beginning of the year	$	8,904,534	$	9,130,804	$	8,882,559
Allowances(reversal)  made during the year		234,898		(226,533)		1,273,437
Foreign exchange effect		(8,628)		(21,712)		(67,125)
Closing balance	$	9,130,804	$	8,882,559	$	10,088,871

Allowances for advances for purchases of property, plant and equipment [Member]

ALLOWANCE [Line Items]

Schedule of allowances

	At December 31,
	2014		2015		2016
Beginning of the year	$	1,306,139	$	1,286,046	$	1,960,329
Allowances made during the year		12,983		769,367		30,811
Write off		-		-		(350)
Foreign exchange effect		(33,076)		(95,084)		(149,647)
Closing balance	$	1,286,046	$	1,960,329	$	1,841,143

Allowances for advances to suppliers [Member]

ALLOWANCE [Line Items]

Schedule of allowances

	At December 31,
	2014		2015		2016
Beginning of the year	$	4,442,627	$	4,459,487	$	4,441,461
Allowances made during the year		26,263		1,286		1,550,615
Write-off		-		(49)		-
Foreign exchange effect		(9,403)		(19,263)		(195,396)
Closing balance	$	4,459,487	$	4,441,461	$	5,796,680