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Expenses by nature (Tables) | 12 Months Ended
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Dec. 31, 2020
Analysis of income and expense [abstract] |
Summary of Expenses by nature |
|  | Year ended December 31, |
|  | 2018 |  |  | 2019 |  |  | 2020 |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Raw materials and supplies used |  |  | 3,079,909 |  |  |  | 3,575,283 |  |  |  | 4,708,493 |
Employee benefit expenses |  |  | 5,606,833 |  |  |  | 6,075,773 |  |  |  | 6,010,227 |
Depreciation expenses |  |  | 3,376,579 |  |  |  | 3,731,914 |  |  |  | 4,175,519 |
Others |  |  | 4,464,499 |  |  |  | 4,590,720 |  |  |  | 4,686,218 |
|  |  | 16,527,820 |  |  |  | 17,973,690 |  |  |  | 19,580,457 |

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- Definition The disclosure of expenses by nature. [Refer: Expenses, by nature] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
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