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Consolidated Statements of Cash Flows
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
CASH FLOWS FROM OPERATING ACTIVITIES        
Profit before income tax $ 80,193,769 $ 2,890,906 $ 35,768,798 $ 23,279,811
Adjustments for:        
Depreciation expense 50,470,157 1,819,400 47,525,688 46,890,235
Amortization expense 4,054,120 146,147 3,733,377 3,576,606
Net loss (gain) on fair value change of financial assets and liabilities at fair value through profit or loss 1,490,005 53,713 71,848 (1,646,822)
Finance costs 2,831,307 102,066 3,459,511 4,203,395
Interest income (542,329) (19,550) (520,783) (549,681)
Dividend income (289,852) (10,449) (150,715) (185,061)
Share-based payments compensation 699,211 25,206 955,575 871,699
Share of profit of associates and joint ventures (899,700) (32,433) (547,612) (182,275)
Loss (gain) on disposal of property, plant and equipment (71,770) (2,587) (460,868) 164,467
Impairment loss recognized on financial assets 4,718 170   400,201
Reversal of impairment loss recognized on financial assets     (56,950) (35,727)
Impairment loss recognized on non- financial assets 774,712 27,929 2,486,066 653,140
Gain on disposal of subsidiaries (17,340,418) (625,105) (802,753)  
Gain on remeasurement of investments accounted for using the equity method       (319,712)
Loss (gain) on disposal of investments accounted for using the equity method 67,482 2,433 (91,297)  
Gain from bargain purchase - acquisition of subsidiaries (33,114) (1,193)    
Net gain on foreign currency exchange (1,668,522) (60,149) (2,543,821) (1,498,107)
Others (74,356) (2,680) (295,859) 8,687
Changes in operating assets and liabilities        
Financial assets mandatorily at fair value through profit or loss 2,174,012 78,371 2,188,285 6,102,421
Contract assets (1,345,069) (48,489) 1,113,950 (1,408,816)
Trade receivables (27,957,812) (1,007,852) (9,396,304) 995,839
Other receivables (354,849) (12,792) (773,411) (10,755)
Inventories (23,325,588) (840,865) (13,559,192) 1,407,099
Other current assets (819,252) (29,533) 366,237 (1,206,456)
Other operating activities assets (785,204) (28,306) (14,396)  
Financial liabilities held for trading (3,814,095) (137,495) (2,763,864) (1,053,535)
Trade payables 13,654,819 492,243 14,032,779 (1,024,250)
Other payables 5,938,081 214,062 3,601,102 1,515,776
Other current liabilities 5,552,277 200,154 23,520 655,694
Other operating activities liabilities 2,017,904 72,743 (301,838) 267,965
Cash generated from operations 90,600,644 3,266,065 83,047,073 81,871,838
Interest received 527,551 19,018 479,900 549,846
Dividend received 655,537 23,631 512,287 518,115
Interest paid (2,625,883) (94,661) (3,442,545) (4,015,673)
Income tax paid (7,423,947) (267,626) (5,536,077) (6,620,876)
Net cash generated from operating activities 81,733,902 2,946,427 75,060,638 72,303,250
CASH FLOWS FROM INVESTING ACTIVITIES        
Purchase of financial assets at fair value through other comprehensive income (32,246) (1,162) (259,168) (409,985)
Proceeds from sale of financial assets at fair value through other comprehensive income 672 24 20,686  
Return of capital from financial assets at fair value through other comprehensive income 14,201 512 84,186 12,664
Purchase of financial assets at fair value through profit or loss       (26,852)
Proceeds from sale of financial assets at amortized cost 26,531 956    
Acquisition of associates and joint ventures (226,560) (8,167) (186,071) (2,107,844)
Proceeds from disposal of investments accounted for using the equity method     2,271,618  
Net cash outflow on acquisition of subsidiaries (180,718) (6,515) (8,745,638) (81,646)
Proceeds from disposal of subsidiaries 23,941,276 863,060 3,717,039  
Return of capital from investments accounted for using the equity method     125,005  
Payments for property, plant and equipment (70,905,659) (2,556,080) (62,077,446) (56,810,153)
Proceeds from disposal of property, plant and equipment 1,605,002 57,859 4,449,113 448,939
Payments for intangible assets (1,069,866) (38,568) (982,655) (1,411,068)
Proceeds from disposal of intangible assets 1,421 51 8,353 6,929
Payments for right-of-use assets (956,218) (34,471) (118,354) (288,052)
Payments for investment properties     (6,352) (2,532)
Proceeds from disposal of investment properties       5
Increase in other financial assets (372,091) (13,414) (822,959) (2,275,354)
Decrease in other financial assets 447,665 16,138 1,083,934 8,561,929
Increase in other non-current assets (1,416,675) (51,070) (1,338,269) (216,158)
Decrease in other non-current assets 324,270 11,690 1,244,650 20,032
Income tax paid (570,700) (20,573)    
Proceeds from disposal of right-of-use assets 278,126 10,026 585,902  
Other investing activities items     123 89
Net cash used in investing activities (49,091,569) (1,769,704) (60,946,303) (54,579,057)
CASH FLOWS FROM FINANCING ACTIVITIES        
Proceeds from short-term borrowings 10,043,398 362,055    
Repayment of short-term borrowings     (1,502,323) (4,683,142)
Proceeds from bonds offering 3,280,943 118,275 19,967,149 19,279,033
Repayment of bonds payable (7,000,000) (252,343) (250,000)  
Proceeds from long-term borrowings 190,192,666 6,856,260 180,020,420 165,757,252
Repayment of long-term borrowings (174,173,841) (6,278,797) (206,520,559) (164,612,521)
Repayment of the principle portion of lease liabilities (907,403) (32,711) (844,357) (636,556)
Dividends paid (18,082,500) (651,857) (8,520,982) (10,623,030)
Proceeds from exercise of employee share options 2,727,915 98,339 1,934,530 1,149,227
Payments for buy-back of ordinary shares (5,529,255) (199,324)    
Decrease in non-controlling interests (6,400,212) (230,721) (6,291,089) (12,117,251)
Other financing activities items (22,557) (813) 11,867 (11,820)
Net cash used in financing activities (5,870,846) (211,637) (21,995,344) (6,498,808)
EFFECTS OF EXCHANGE RATE CHANGES ON THE BALANCE OF CASH AND CASH EQUIVALENTS HELD IN FOREIGN CURRENCY (2,236,213) (80,613) (711,795) (2,612,946)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 24,535,274 884,473 (8,592,804) 8,612,439
CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR 51,538,071 1,857,897 60,130,875 51,518,436
CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR $ 76,073,345 $ 2,742,370 $ 51,538,071 $ 60,130,875