【HannStar Board】Announcement by its subsidiary, HannStar Board Technology (Jiangyin) Co., Ltd., regarding the appointment of a new General Manager for the Jiangyin District Business Unit

1. Type of Personnel Change (Please enter Spokesperson, Acting Spokesperson, Important Operational Executive (e.g., CEO, COO, CMO, CSO, etc.), Financial Manager, Accounting Manager, Corporate Governance Officer, Information Security Officer, R&D Manager, Internal Audit Manager, or Litigation/Non-Litigation Agent): General Manager of Jiangyin District Business Unit 2. Date of Change: 2026/04/28 (ROC calendar year 115) 3. Name, Title, and Resume of Former Appointee: Not applicable 4. Name, Title, and Resume of New Appointee: Mr. Zeng Jia-xing / Acting General Manager of Jiangyin District Business Unit 5. Nature of Change (Please enter "Resignation", "Job Adjustment", "Layoff", "Retirement", "Death", "New Appointment" or "Dismissal"): New Appointment 6. Reason for Change: New Appointment 7. Effective Date: 2026/05/01 8. Other matters to be specified: None