5243 Yisheng-KY Invited to Fubon Securities' Hon Hai and Investee Enterprises Themed Seminar Series

Announcement Date: July 14, 2026 Statement Date: July 13, 2026 Statement Time: 16:34:35 Company Code: 5243 Company Name: Yisheng-KY Subject: The company has been invited to attend the seminar series on Hon Hai and its invested enterprises, organized by Fubon Securities. Applicable Clause: Clause 12 Factual Date: July 15, 2026

Details: Conforms to Article 4, Paragraph XX, Clause 12 Factual Date: 07/15/2026

1. Date of the corporate briefing: July 15, 2026 2. Time of the corporate briefing: 10:00 AM 3. Location of the corporate briefing: Public Enterprise Center, National Chengchi University (No. 187, Jinhua Street, Da'an District, Taipei City, Building A, 10th Floor) 4. Summary of the briefing: Yisheng-KY has been invited to participate in the seminar series on Hon Hai and its invested enterprises, hosted by Fubon Securities, where it will present an overview of its business operations. 5. Other matters to be disclosed: None

For complete financial and business information, please refer to the corporate briefing schedule or the investor presentation section on the Public Information Observation Station website.