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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating activities: |  |  |
Net income | $ 864,847,000 | $ 133,807,000 | $ 29,523,000
Less: (Loss) income from discontinued operations, net of tax |  | (141,000) | 1,261,000
Net income from continuing operations | 864,847,000 | 133,948,000 | 28,262,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Share-based compensation | 10,077,000 | 17,908,000 | 17,897,000
Depreciation of property, plant and equipment | 77,366,000 | 68,686,000 | 47,371,000
Prepaid land use rights | 821,000 | 693,000 | 582,000
Loss on disposal of property plant and equipment | 2,749,000 | 1,103,000 |
Inventory write-down | 0 | 1,956,000 | 327,000
Fair value change of short-term investments | (2,407,000) |  |
Others | 4,378,000 | 616,000 | 50,000
Changes in operating assets and liabilities: |  |  |
Accounts receivable |  | 13,000 | 1,163,000
Notes receivable | (360,259,000) | 5,553,000 | 2,389,000
Prepaid expenses and other current assets | (31,556,000) | 6,689,000 | (5,174,000)
Advances to suppliers | 4,755,000 | (6,018,000) | 1,758,000
Inventories | (280,187,000) | (5,125,000) | (21,635,000)
Amounts due from related parties | 118,000 | (94,000) |
Operating lease right-of-use assets |  | 65,000 | (248,000)
Other non-current assets | 62,000 | (145,000) |
Accounts payable | 61,067,000 | 4,556,000 | 3,660,000
Notes payable | (26,068,000) | (54,345,000) | 78,386,000
Accrued expenses and other current liabilities | 9,727,000 | 16,138,000 | 2,942,000
Income tax payable | 47,451,000 | 16,629,000 | (605,000)
Advances from customers | 243,695,000 | 3,335,000 | 18,063,000
Amounts due to related parties | 25,000 | (38,000) | 103,000
Deferred government subsidies | (562,000) | (497,000) | (171,000)
Lease liability | (83,000) | (86,000) | 164,000
Deferred taxes | 12,973,000 | (1,787,000) | 4,696,000
Net cash provided by operating activities-continuing operations | 638,989,000 | 209,753,000 | 179,980,000
Net cash provided by(used in) operating activities-discontinued operations |  | (50,000) | 1,010,000
Net cash provided by operating activities | 638,989,000 | 209,703,000 | 180,990,000
Investing activities: |  |  |
Purchases of property, plant and equipment | (498,505,000) | (118,292,000) | (279,044,000)
Purchases of land use rights | (9,755,000) |  | (6,593,000)
Purchase of short-term investments | (501,441,000) |  |
Redemption of short-term investments | 227,807,000 |  | 21,726,000
Acquisition of Xinjiang Daqo Investment |  |  | 627,000
Net cash used in investing activities-continuing operations | (781,894,000) | (118,292,000) | (263,284,000)
Net cash provided by (used in) investing activities-discontinued operations |  | (195,000) | 1,457,000
Net cash used in investing activities | (781,894,000) | (118,487,000) | (261,827,000)
Financing activities: |  |  |
Proceeds from related parties loans | 13,213,000 | 22,869,000 | 20,388,000
Repayment of related parties loans | (18,133,000) | (47,538,000) | (20,388,000)
Proceeds from bank borrowings | 48,822,000 | 98,573,000 | 178,227,000
Repayment of bank borrowings | (244,776,000) | (198,043,000) | (74,554,000)
Proceeds from options exercised | 2,139,000 | 580,000 | 791,000
Proceeds from sales of equity interest in the Group's subsidiary |  | 28,088,000 | 515,000
Proceeds from subsidiary's public offering of ordinary shares, net of issuance cost paid of $59 million | 934,960,000 |  |
Net cash provided by (used in) financing activities-continuing operations | 736,225,000 | (95,471,000) | 104,979,000
Net cash used in financing activities-discontinued operations |  |  | (2,651,000)
Net cash provided by (used in) financing activities | 736,225,000 | (95,471,000) | 102,328,000
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 12,242,000 | 7,365,000 | (1,317,000)
Net increase in cash, cash equivalents and restricted cash | 605,562,000 | 3,110,000 | 20,174,000
Cash, cash equivalents and restricted cash at the beginning of the year (includes $1,091,190, $845,199 and nil of cash, cash equivalents and restricted cash in current assets associated with discontinued operations on December 31, 2019, 2020 and 2021) | 118,404,000 | 115,294,000 | 95,120,000
Cash, cash equivalents and restricted cash at the end of the year (includes $845,199, nil and nil of cash, cash equivalents and restricted cash in current assets associated with discontinued operations on December 31, 2019, 2020 and 2021) | 723,966,000 | 118,404,000 | 115,294,000
Cash and cash equivalents | 723,775,000 | 76,596,000 | 52,685,000
Restricted cash | 191,000 | 41,808,000 | 62,609,000
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows | 723,966,000 | 118,404,000 | 115,294,000
Supplemental disclosure of cash flow information: |  |  |
Interest paid, net of capitalized interest | 21,158,000 | 24,696,000 | 10,215,000
Income taxes paid | 108,099,000 | 12,808,000 | 5,546,000
Supplemental schedule of non-cash investing activities: |  |  |
Purchases of property, plant and equipment included in payables | 142,937,000 | 73,148,000 | 135,702,000
Purchase of property, plant and equipment included in amounts due to related parties - short-term portion | $ 5,979,000 | $ 198,000 | $ 26,539,000

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