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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities    
Net loss $ (10,853,435) $ (1,957,482)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 2,753,200 2,466,127
Provision for doubtful accounts 1,046,360 162,488
Write-down of inventories 834,362 160,469
Share-based compensation 770,113 221,180
(Gain) Loss on disposal of property, plant and equipment 213,749 (10,177)
Gain on disposal of patented proprietary technology (Note 7) (12,118,675)
Impairment charge 2,326,552 918,461
Changes in operating assets and liabilities:    
Trade accounts and bills receivable 10,313,229 33,723,869
Inventories 11,044 (475,664)
Prepayments and other receivables 2,808,375 (739,871)
Trade accounts and bills payable (30,530,773) (9,760,687)
Accrued expenses and other payables and product warranty provisions 1,087,216 1,486,223
Trade receivable from and payables to former subsidiaries (2,002,358) (5,349,699)
Net cash provided by (used in) operating activities (21,222,366) 8,726,562
Cash flows from investing activities    
Proceeds on disposal of property, plant and equipment 32,719 31,594
Purchases of property, plant and equipment and construction in progress (2,452,907) (7,359,041)
Net cash used in investing activities (2,420,188) (7,327,447)
Cash flows from financing activities    
Capital injection from non-controlling interests 127,338 26,823
Proceeds from bank borrowings 5,776,497 25,316,074
Repayment of bank borrowings (3,643,971) (19,256,963)
Borrowings from unrelated parties 6,341,117
Repayment of borrowings from unrelated parties (14,477)
Borrowings from related parties 492,233 17,903,224
Repayment of borrowings from related parties (1,365,714) (17,593,772)
Borrowings from shareholders 4,053,682
Repayment of earnest money to shareholders (966,579)
Proceeds from issuance of promissory notes (Note 17) 2,750,000
Net cash provided by financing activities 13,550,126 6,395,386
Effect of exchange rate changes on cash and cash equivalents and restricted cash (463,117) (853,721)
Net increase (decrease) in cash and cash equivalents and restricted cash (10,555,545) 6,940,780
Cash and cash equivalents and restricted cash at the beginning of year 17,689,493 10,748,713
Cash and cash equivalents and restricted cash at the end of year 7,133,948 17,689,493
Supplemental non-cash investing and financing activities:    
Transfer of construction in progress to property, plant and equipment 5,975,163 8,617,337
Proceeds on disposal of patented proprietary technology offset against amount due to a former subsidiary (Note 7) 12,845,795
Issuance of common stock (Note 1):- offset short term borrowings (First Debt, Second Debt and Third Debt) 15,029,948
– offset construction cost payable (Fourth Debt) 3,343,378
 – offset accounts payable (Fifth Debt) and unpaid earnest money 5,159,831  
Income taxes
Interest, net of amounts capitalized $ 1,378,349 $ 1,013,335