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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net income | $ 7,953,313 | $ 36,225,831
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Interest on capital lease obligation | 163,184 | 174,167
Amortization of prepaid land leases | 982,108 | 774,250
Depreciation and amortization | 20,197,313 | 24,880,246
Allowance for obsolete and slow-moving inventories | 43,921 | (12,691)
Write-off / Impairment loss on property, plant and equipment | 17,581,244 | 106,545
Loss on demolition of factory | 0 | 1,053,445
Unrealized translation difference | 1,557,759 | (1,702,728)
Deferred tax asset | (4,126,947) | 3,013
Stock-based compensation expense -options | 372,400 | 40,300
Treasury stock issued for services | 17,800 | 15,000
Changes in assets and liabilities |  |
Accounts receivable | 26,110,087 | (6,167,996)
Other receivables | (580) | (877)
Inventories | 4,883,850 | 901,528
Prepayment and deposits | (1,389,367) | (128,384)
Accounts payable and accrued expenses | (8,203,290) | (503,015)
Retention payable | 206,211 | (365,150)
Taxes payable | (3,597,390) | (76,886)
Net cash provided by operating activities | 62,751,616 | 55,216,598
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Additions of prepaid land leases | (10,481,323) | (673,934)
Compensation received from government on property disposition | 0 | 2,708,417
Purchase of property, plant and equipment | (17,938,652) | (16,995,862)
Net cash used in investing activities | (28,419,975) | (14,961,379)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Repayment of capital lease obligation | (273,873) | (287,387)
Net cash used in financing activities | (273,873) | (287,387)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS | 10,964,417 | (9,689,650)
NET INCREASE IN CASH AND CASH EQUIVALENTS | 45,022,185 | 30,278,182
CASH AND CASH EQUIVALENTS - BEGINNING OF YEAR | 163,884,574 | 133,606,392
CASH AND CASH EQUIVALENTS - END OF YEAR | 208,906,759 | 163,884,574
Cash paid during the year for: |  |
Income taxes | 11,113,143 | 12,140,763
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES |  |
Par value of common stock issued upon cashless exercise of options | $ 0 | $ 386

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- Definition Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 + Details
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Period Type: | duration

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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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Period Type: | duration

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- Definition Value of shares of stock issued attributable to transactions classified as other. + References No definition available. + Details
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