[Dah In] Announcement of disposal of machinery and equipment at the Tainan Science Park Plant

1. Name and nature of the underlying asset: A batch of machinery and equipment at the Company's Tainan Science Park plant. 2. Date of occurrence of the event: 2026/04/22 3. Date of board of directors' approval: 2026/04/22 4. Date of other competent authority approval: Not applicable 5. Transaction volume, unit price, and total transaction amount: (1) Volume: A batch of equipment (2) Total amount: USD 18,110 thousand (approx. NTD 579,429 thousand based on the exchange rate of 31.995 on 2026/03/31) 6. Counterparty and its relationship to the Company: Anhui Yuehao Electronic Equipment Co., Ltd. (Non-related party) [Items 7-8 omitted as not applicable] 9. Expected disposal gain (or loss): Expected disposal gain of approximately NTD 346,217 thousand. The actual cost and gain/loss will be subject to the CPA's audit. 10. Terms of delivery or payment: Payment according to order terms. 11. Method of determining the transaction: Price negotiation based on appraisal report and market conditions, decided by the Board of Directors. 12. Name of professional appraisal firm and appraisal amount: Hongbang Asset Consulting Co., Ltd., appraisal amount approx. NTD 236,730 thousand. 23. Purpose of acquisition or disposal: Asset activation. [Other items omitted as none or not applicable]