Hung Yih Fiber Industrial Experiences Power Outage at Yingge Plant

Release Date: August 4, 2026 Statement Date: August 3, 2026 Statement Time: 19:13:22 Company Code: 1452 Company Name: Hung Yih Subject: Explanation of Power Outage Incident Applicable Clause: Clause 51 Event Date: August 3, 2026

Details: 1. Event Date: August 3, 2026 2. Company Name: Hung Yih Fiber Industrial Co., Ltd. 3. Relationship to Company (please enter '本公司' or 'Subsidiary'):本公司 (Our Company) 4. Cross-shareholding Ratio: Not applicable 5. Cause of Incident: On August 2, 2026, rodent damage caused transformer failure at the company's Yingge plant, resulting in a power outage. 6. Response Measures: Upon the outage, the company immediately activated emergency response protocols and conducted safety inspections. All personnel are safe. Production equipment has been temporarily halted, and full recovery efforts are underway. Initial estimates indicate operations will resume within 5–6 days. The financial and operational impact, including equipment repair costs and production disruption, is currently being assessed. 7. Other Matters to Note (If the subject of the event or resolution is a publicly issued company or above, this significant information also meets Article 7, Paragraph 9, Clause 9 of the Enforcement Rules of the Securities and Exchange Act regarding matters significantly affecting shareholder rights or securities prices): None