【Chang Hsin】Company Invited to Attend Institutional Investor Briefing Hosted by Taishin Securities on August 28, 2026

Pursuant to Clause 4, Item XX: 12 Date of Fact: 2026/08/28

1. Date of Institutional Investor Briefing: 2026/08/28 2. Time of Institutional Investor Briefing: 14:30 3. Venue of Institutional Investor Briefing: Formosa Conference Room, B1, Taishin Financial Building, No. 96, Section 1, Jianguo North Road, Zhongshan District, Taipei City 4. Summary of Briefing: Chang Hsin has been invited by Taishin Securities to attend its institutional investor briefing, during which the company will present its corporate profile and current business operations. 5. Other Matters to be Disclosed: None

For complete financial and business information, please refer to the Institutional Investor Briefing Schedule or the relevant section on the Public Information Observation System.

Keyword: Material Information