Yung-Kuan-KY Announces Resignation of Company Director

1. Date of Change: 2026/06/18 2. Category of Appointed or Changed Personnel (Corporate Director, Corporate Supervisor, Independent Director, Natural Person Director, or Natural Person Supervisor): Natural Person Director 3. Former Position and Name: Director / Sun Rui-Jian 4. Former Director’s Resume: Director at Sanyang Metal Industry Co., Ltd. 5. New Appointee’s Position and Name: Not Applicable 6. New Appointee’s Resume: Not Applicable 7. Nature of Change (Resignation, Removal, End of Term, Death, or New Appointment): Resignation 8. Reason for Change: Health-related factors 9. Shareholding Number at Time of New Appointment: Not Applicable 10. Original Term (e.g., xx/xx/xx ~ xx/xx/xx): 2025/05/28 ~ 2028/05/27 11. Effective Date of New Appointment: Not Applicable 12. Director Turnover Rate within Same Term: 4/9 13. Independent Director Turnover Rate within Same Term: Not Applicable 14. Supervisor Turnover Rate within Same Term: Not Applicable 15. Is the Change Involving One-Third or More of Directors? (Yes or No): Yes 16. Other Matters to be Clarified: The Company received a resignation letter from Director Mr. Sun Rui-Jian on 2026/06/18.

Keyword: Material Information