【Tongtai】Announcement by the Company's Board of Directors regarding matters for the 2026 Annual General Meeting of Shareholders (Change of venue and addition of agenda items)

1. Date of board of directors' resolution: 115/04/27 (April 27, 2026) 2. Date of shareholders' meeting: 115/06/25 (June 25, 2026) 3. Venue of shareholders' meeting: 3F, No. 36, Youshi Road, Dajia District, Taichung City (Dajia Industrial Park Service Center) 4. Method of holding shareholders' meeting (physical shareholders' meeting/video-assisted shareholders' meeting/video shareholders' meeting): Physical shareholders' meeting 5. Agenda item one: Reporting matters (1): Report on the distribution of employee and director compensation for the company's fiscal year 2025 (2): Business report for the company's fiscal year 2025 (3): Audit Committee's review report on the company's fiscal year 2025 financial statements (4): Status of implementation of the company's sound operation plan 6. Agenda item two: Approval matters (1): The company's 2025 business report and financial statements (2): The company's 2025 loss appropriation statement 7. Agenda item three: Discussion matters (1): Proposal to lift the non-compete restrictions for the newly appointed directors of the company's 13th term 8. Ad-hoc motions: 9. Book closure start date: 115/04/27 (April 27, 2026) 10. Book closure end date: 115/06/25 (June 25, 2026) 11. Other matters to be specified: None Keywords: Material Information