CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities
Net income	$ 957,387	$ 2,028,541
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	538,224	381,849
Changes in operating assets and liabilities:
Accounts receivable, net	(442,869)	(1,745,281)
Inventories	248,792	(182,837)
Amount due from related parties	118,061	1,049,041
Prepayments and other current assets	875,152	116,680
Accounts payable	476,760	543,549
Amount due to related parties	(4,699)	(13,197)
Deposits received	(5,089)	3,832
Accrued expenses and other current liabilities	272,288	(47,917)
Net cash provided by operating activities	3,034,007	2,134,260
Cash Flows From Investing Activities
Purchases of property and equipment	(1,503,611)	(698,950)
Prepayment for property and equipment acquisition	(454,761)	(514,640)
Payment of Construction in progress	(264,687)
Net cash (used in) investing activities	(2,223,059)	(1,213,590)
Cash Flows From Financing Activities
Proceeds from shareholders		134,565
Payments of finance lease obligations	(913,812)	(694,479)
Interest	225,860	306,004
Short-term bank loan		(458,342)
Proceeds from finance lease	2,870,312
Net cash provided by (used in) financing activities	2,182,360	(712,252)
Effect of exchange rate fluctuation on cash and cash equivalents	23,870	107,728
Net increase in cash and cash equivalents	3,017,178	316,146
Cash and cash equivalents, beginning of period	256,450	884,292
Cash and cash equivalents, ending of period	3,273,628	1,200,438
Supplemental disclosure of cash flow information
Cash paid for income taxes	255,792	581
Cash paid for interest	$ 225,860	$ 306,004