Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net loss	$ (767,327)	$ (660,897)
Depreciation and amortization	700,187	655,921
Bad debt (benefit) expense	(8,221)	30,246
Inventory write off	54,145
Changes in assets and liabilities:
Trade accounts and other receivables	(275,821)	(341,165)
Advances to suppliers	(1,474)	(1,065,639)
Inventory	211,393	(24,688)
Trade accounts payable	(115,768)	(505,131)
Other payables and accrued expenses	60,704	156,044
Change in bankers' acceptance notes payable		226,206
Advances from customers	(144,602)	1,465,030
Prepaid expenses	9,868	(180,082)
Net Cash Used in Operating Activities	(276,916)	(244,155)
Cash Flows from Investing Activities:
Purchases of property and equipment		(347,795)
Net Cash Used in Investing Activities		(347,795)
Cash Flows from Financing Activities:
Payments of construction term loan	(154,215)	(143,286)
Payments of line of credit	(46,265)
Borrowings and interest from related party	306,688	36,293
Repayments to related party	(251,371)
Net Cash Used in Financing Activities	(145,163)	(106,993)
Effect of Exchange Rate Changes on Cash	(1,044)	(8,974)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(423,123)	(707,917)
Cash and Cash Equivalents at Beginning of Period	957,653	1,184,887
Cash, Cash Equivalents and Restricted Cash at End of Period	534,530	476,970
Cash and Cash Equivalents	534,530	145,932
Restricted cash		331,038
Cash, Cash Equivalents and Restricted Cash at End of Period	534,530	476,970
Supplemental Cash Flow Information:
Cash paid for income taxes
Cash paid for interest	60,368	57,044
Supplemental Noncash Investing and Financing Activities:
Accounts receivable collected with banker's acceptances	194,641	71,127
Inventory purchased with banker's acceptances	$ 248,713	$ 68,037