Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 170,567	$ 1,612,957
Pledged deposits	5,339,114	5,520,991
Trade accounts and bills receivable, net	10,739,325	7,952,420
Inventories	7,429,629	8,666,714
Prepayments and other receivables	4,639,167	4,735,913
Total current assets	28,317,802	28,488,995
Property, plant and equipment, net	36,973,925	38,177,565
Construction in progress	21,859,350	21,707,624
Right-of-use assets	7,035,733	7,194,195
Intangible assets, net	13,644	15,178
Total assets	94,200,454	95,583,557
Current liabilities
Trade accounts and bills payable	14,684,873	15,072,108
Short-term bank borrowings	5,635,673	5,730,289
Current maturities of long-term bank loans	10,665,405	10,844,463
Other short-term loans	5,258,801	7,351,587
Notes payable	2,715,833	2,846,736
Accrued expenses and other payables	15,403,598	15,527,589
Payables to former subsidiaries, net	5,684,401	1,483,352
Deferred government grants, current	139,681	142,026
Total current liabilities	60,188,265	58,998,150
Long-term bank loans	9,361,855	9,519,029
Deferred government grants, non-current	4,015,878	4,118,807
Product warranty provision	2,206,123	2,246,933
Long term tax payable	6,926,298	7,042,582
Total liabilities	82,698,419	81,925,501
Commitments and contingencies
Shareholders’ equity(deficit)
Common stock $0.001 par value; 500,000,000 authorized; 53,220,902 issued and 53,076,696 outstanding as of December 31, 2019, 53,588,799 issued and 53,444,593 outstanding as of March 31, 2020	53,590	53,222
Donated shares	14,101,689	14,101,689
Additional paid-in capital	180,708,377	180,208,610
Statutory reserves	1,230,511	1,230,511
Accumulated deficit	(178,537,394)	(176,177,413)
Accumulated other comprehensive loss	(2,045,945)	(1,744,730)
Stockholders' equity (deficit) before Treasury Stock	15,510,828	17,671,889
Less: Treasury shares	(4,066,610)	(4,066,610)
Total shareholders’ equity	11,444,218	13,605,279
Non-controlling interests	57,817	52,777
Total equity	11,502,035	13,658,056
Total liabilities and shareholder’s equity	$ 94,200,454	$ 95,583,557