CONSOLIDATED STATEMENTS OF CASH FLOWS ¥ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Cash flows from operating activities
Net income	$ 13,154,581	$ 17,213,896
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	5,938,295	5,290,980
(Recovery of bad debt) bad debt expense	(784,431)	58,728
Loss on disposal of property, plant and equipment	272,633	48,976
Impairment of property, plant and equipment	569,120	0
Deferred taxes	(156,441)	374,626
Changes in fair value of foreign exchange derivatives	1,145,387	(228,314)
Gain on deconsolidation of a subsidiary	0	(6,004,008)
Equity in loss (earnings) of investee	140,132	(107,243)
Gain on dilution in equity method investee	0	(500,270)
Gain on sale of long-term investment	0	(1,677,367)
Share based compensation	941,031	326,171
Changes in fair value of warrant liability	0	(259)
Changes in operating assets and liabilities:
Accounts receivable	(21,085,450)	(11,926,311)
Other assets	76,027	(288,180)
Notes receivable	2,291,487	(1,389,107)
Advances to suppliers	3,567,895	(5,070,174)
Prepayments and other receivables	(5,039,974)	(673,006)
Amount due from a related party	650,454	7,140,963
Amount due to related parties	141,577	(1,569,839)
Inventories	(14,407,492)	(24,705,574)
Accounts payable	5,509,066	15,183,933
Deferred government grants	250,989	154,151
Other payables and accrued liabilities	14,422,792	2,023,991
Income taxes payable	(86,809)	2,240,550
Net cash flows provided by (used in) operating activities	7,510,869	(4,082,687)
Cash flows from investing activities
Acquisitions of plant and equipment	(15,598,608)	(13,730,328)
Loan to a related party	0	(514,821)
Proceeds from sale of long-term investment	0	10,535,062
Impact to cash resulting from deconsolidation of a subsidiary	0	(632,754)
Payment for long-term investment	(316,484)	0
Net cash flows used in investing activities	(15,915,092)	(4,342,841)
Cash flows from financing activities
Proceeds from short-term bank loans	28,824,056	12,725,676
Repayments of short-term bank loans	(12,983,353)	(22,331,365)
Proceeds from a related party	5,945,384	0
Repayment of loan from a related party	(195,919)	0
Proceeds from non-financial institution borrowings	0	10,386,681
Repayments of non-financial institution borrowings	(1,507,068)	(3,857,910)
Proceeds from notes payable	130,784,037	90,871,294
Repayments of notes payable	(108,233,565)	(69,511,376)
Payment of derivative instruments	(375,260)	0
Proceeds from exercise of employee options	0	802,691
Repayment from GZ Highpower	0	6,035,600
Net cash flows provided by financing activities	42,258,312	25,121,291
Effect of foreign currency translation on cash	(4,898,089)	3,222,321
Net increase in cash and restricted cash	28,956,000	19,918,084
Cash and restricted cash- beginning of year	40,456,117	20,538,033
Cash and restricted cash- end of year	69,412,117	40,456,117
Cash paid for:
Income taxes	2,625,182	1,700,149
Interest expenses	1,950,076	1,550,878
Non-cash investing and financing activities:
Shares issued for legal case settlement	212,500	0
Offset of deferred income related to government grant and property, plant and equipment	75,584	263,948
Purchase of property and equipment financed by accounts payables	3,895,765	(1,150,460)
Reconciliation of cash and restricted cash
Cash	24,916,484	14,502,171
Restricted cash	44,495,633	25,953,946
Total cash and restricted cash shown in the consolidated statements of cash flows	$ 69,412,117	$ 40,456,117