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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities |  |  |
Net loss | $ (10,692,982) | $ (10,022,228) | $ (9,958,695)
Net loss from discontinued operations | 0 | 0 | 299,412
Net loss from continuing operations | (10,692,982) | (10,022,228) | (9,659,283)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |
(Reversal of) allowance for doubtful accounts - accounts receivable | (52,789) | (845,416) | 1,297,752
(Reversal of) allowance for doubtful accounts - advance to suppliers | (142,799) | (378,233) | 164,220
Write off manufacturing rebate receivable | 5,819,059 | 0 | 0
(Reversal of) Allowance for doubtful accounts - other receivables | 0 | (84,573) | 705,400
Share based compensation | 1,840,000 | 0 | 0
Inventory reserve | 359,501 | 92,064 | 1,030,236
Impairment of goodwill and intangible asset | 0 | 11,998,606 | 9,584,000
Decrease in deferred tax liability | 0 | (1,799,791) | (165,500)
Depreciation expense | 444,462 | 436,427 | 462,639
Amortization of intangible asset | 472,140 | 441,489 | 441,489
Amortization of right of use assets | 44,964 | 0 | 0
Amortization of prepaid consulting expense | 0 | 0 | 140,738
Loss (gain) from disposal of property, plant and equipment | (545,844) | 68,614 | (8,047)
Issuance of common stock for service | 0 | 33,812 | 0
Contingent liability | 535,389 | 0 | 0
Changes in operating assets and liabilities: |  |  |
Accounts receivable - non-related party | (9,573,463) | 8,024,036 | (9,879,682)
Accounts receivable - related party | 0 | 0 | 0
Advances to suppliers | 3,694,066 | 7,093,022 | 415,727
Advances to suppliers - related party | 1,550,000 | (1,448,000) | 0
Inventory | (737,552) | (125,492) | 242,142
Prepaid expenses and other receivables | (768,288) | 133,768 | 9,127
Manufacturing rebate receivable |  | 2,374,720 | 1,563,840
Accounts payable | (16,266) | (206,261) | (751,363)
Accrued liabilities and other payables | (323,441) | 313,552 | (78,923)
Customer deposits | 318,875 | (3,792,409) | 6,184,836
Collection of receivables from discontinued operations | 0 | 0 | 8,962,187
Lease liabilities | (19,824) | 0 | 0
Taxes payable | (295,666) | 1,863,853 | (597,392)
Net cash provided by continuing operations | (8,090,458) | 14,171,560 | 10,064,143
Net cash provided by discontinued operations | 0 | 0 | 4,632,769
Net cash provided by operating activities | (8,090,458) | 14,171,560 | 14,696,912
Cash flows from investing activities |  |  |
Acquisition of property, plant and equipment | (220,308) | (144,806) | (92,369)
Proceeds from disposal of property, plant and equipment | 748,612 | 21,842 | 16,580
Additions to intangible assets | (4,220) | 0 | 0
Payment for investment | 0 | 0 | (6,707,570)
Proceeds from disposition of subsidiaries | 0 | 0 | 854,567
Net cash used in continuing operations | 524,084 | (122,964) | (5,928,792)
Net cash used in discontinued operations | 0 | 0 | (1,522)
Net cash used in investing activities | 524,084 | (122,964) | (5,930,314)
Cash flows from financing activities |  |  |
Proceeds from (repayment of) loans from third parties | 6,917,589 | 0 | (2,823,890)
Repayment of loans from third parties | (310,000) | 0 | 0
Bank acceptance notes payable, net of repayment | (1,772,550) | 1,448,667 | (1,823,003)
Proceeds from bank loans | 7,774,800 | 9,568,384 | 6,918,544
Repayment of bank loans | (8,738,900) | (11,230,688) | (7,352,944)
Proceeds from (repayment of) loans from related parties, net | (10,428,196) | 98,474 | (378,833)
Proceeds from issuance of common stock and warrants | 19,362,706 | 9,055,232 | 0
Net cash provided by (used in) continuing operations | 12,805,449 | 8,940,069 | (5,460,126)
Net cash provided by discontinued operations | 0 | 0 | 0
Net cash provided by (used in) financing activities | 12,805,449 | 8,940,069 | (5,460,126)
Effect of exchange rate changes on cash, restricted cash and cash equivalents | 988,502 | 1,704,662 | (530,288)
Net increase in cash, restricted cash and cash equivalents | 6,227,577 | 24,693,327 | 2,776,184
Cash, restricted cash and cash equivalents, beginning of year | 37,339,304 | 12,645,977 | 9,869,793
Cash, restricted cash and cash equivalents, end of year | 43,566,881 | 37,339,304 | 12,645,977
Supplemental disclosure information: |  |  |
Income taxes paid | 2,278,134 | 436,566 | 1,105,876
Interest paid | $ 265,248 | $ 308,690 | $ 439,869

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