Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities
Net income	$ 15,451,977	$ 27,026,912
Adjustments to reconcile net income to net cash provided by operating activities:
Allowance for doubtful accounts	1,159,061	1,474,872
Depreciation and amortization	11,838,692	9,259,516
Deferred income tax	(37,588)	(807,058)
Loss (gain) on disposal of property and equipment	(40,779)	9,515
Amortization of debt issuance costs	1,168,449
Changes in assets and liabilities:
Account receivable	(23,258,262)	(26,640,753)
Bank acceptance notes from customers	120,433,497	(3,197,464)
Other currents assets	(10,884,355)	(4,371,425)
Inventories, net	(97,808,381)	(43,139,593)
Prepayments	942,352	1,877,272
Other assets	(577,381)
Accounts payable and bank acceptance notes to vendors	121,285,932	46,444,126
Income tax payable	9,534,690	2,126,238
Deposits received from customers	10,765,839	18,302,544
Deferred income	493,752	989,766
Other current liabilities and accrued expenses	692,584	4,466,181
Net Cash Flows Provided By Operating Activities	161,160,079	33,820,649
Cash Flows From Investing Activities
Deposits on loan agreements		(5,196,271)
Acquisition of property, plant, and equipment and land use rights	(55,376,169)	(52,259,319)
Deposits for acquisition of land use rights		(2,982,537)
Refund of deposits for acquisition of land use rights		2,982,537
Acquisition of intangible asset	(225,640)
Advances to related parties	(211,733,387)	(186,885,309)
Repayment of advances to related parties	129,577,381	118,436,661
Net Cash Flows Used In Investing Activities	(137,757,815)	(125,904,238)
Cash Flows From Financing Activities
Proceeds from short term bank loans	527,380,963	206,836,188
Repayment of short term bank loans	(426,390,447)	(113,440,430)
Proceeds from related parties	9,669,326	103,775,545
Repayments to related parties		(139,482,122)
Proceeds from long term loans		29,692,975
Repayment of long term loans	(24,859,848)	(3,008,756)
Payment of debt issuance costs		(1,767,572)
Net Cash Flows Provided By Financing Activities	85,799,994	82,605,828
Effects on changes in foreign exchange rate	(2,837,828)	542,161
Net change in cash, cash equivalents and restricted cash	106,364,430	(8,935,600)
Cash, cash equivalents, and restricted cash - beginning of the year	4,598,176	13,533,776
Cash, cash equivalents, and restricted cash - end of the year	110,962,606	4,598,176
Supplemental Cash Flow Disclosures:
Interest paid	11,653,031	2,860,931
Income taxes paid	6,343,206	3,398,629
Non-cash Investing and Financing Transactions
Liabilities assumed in connection with acquisition of property, plant, and equipment and land use rights	703,698
Land use rights transferred from prepayments	7,733,989
Borrowings from long term loans in the form of bank acceptance notes		29,692,975
Repayments from related party in the form of bank acceptance notes	70,818,463	35,706,576
Repayments to related party in the form of bank acceptance notes	5,097,556
Transfer of debt among related parties		3,711,622
Deposits on loan agreements deducted from proceeds of long term loans		$ 5,196,271