[Datong] Announcement of the Company's Board of Directors' Resolution on Matters Related to the 2026 Annual General Meeting (Added Agenda Item)

1. Board Resolution Date: 115/04/08 (2026/04/08) 2. Date of Shareholder Meeting: 115/05/26 (2026/05/26) 3. Location of Shareholder Meeting: Datong Company Headquarters (North Building, 18th Floor), No. 22, Section 3, Zhongshan North Road, Taipei City 4. Method of Shareholder Meeting (Physical Shareholder Meeting / Video Assisted Shareholder Meeting / Virtual Shareholder Meeting): Physical Shareholder Meeting 5. Agenda Item 1: Reporting Matters (1): 2025 Annual Business and Financial Report of the Company. (2): Review Report of the Audit Committee on the Company's 2025 Fiscal Year Closing Financial Statements. 6. Agenda Item 2: Approval Matters (1): 2025 Business Report and Financial Statements of the Company, for approval. (2): 2025 Loss Compensation Proposal of the Company, for approval. (Added) 7. Agenda Item 3: Discussion Matters (1): Amendment to the Company's Articles of Association, for discussion. (2): Resolution to lift the non-compete restrictions for the Company's directors, for discussion. 8. New Business: 9. Book Closure Start Date: 115/03/28 (2026/03/28) 10. Book Closure End Date: 115/05/26 (2026/05/26) 11. Other Matters to be Noted: None.