Guanshi Electric Announcement: Board of Directors Approved Subsidiary Juheng Development & Construction Co., Ltd.'s Proposed Urban Renewal Joint Construction Project in Zhongzheng District, Taipei City

1. Contract type: Joint construction for housing allocation 2. Date of occurrence: 2026/5/13~2026/5/13 3. Date of Board of Directors' approval: May 13, 2026 (Republic of China calendar year 115) 4. Other approval dates: Not applicable 5. Counterparty to the contract and its relationship with the company: Natural persons (not related parties of the company) 6. Main content of the contract (including total contract amount, estimated amount of participation, and contract start and end dates), restrictive clauses, and other important agreed matters: (1) Land description: 19 plots of land including plot 425, Section 3, Yongchang Segment, Zhongzheng District, Taipei City (2) Base area: A total of 1,869.00 square meters (approximately 565.37 ping) (3) Distribution ratio: Landowner distribution ratio 50%, developer distribution ratio 50% 7. Name of professional appraiser's office or company and their appraisal results: (1) Gaoyuan Real Estate Appraisal Firm's assessed value: Landowner distribution ratio: 50.61%, Developer distribution ratio: 49.39% (2) Zhongtai Real Estate Appraisal Firm's assessed value: Landowner distribution ratio: 50.68%, Developer distribution ratio: 49.32% 8. Real estate appraiser's name: (1) Chen Pi-Yuan, Appraiser, Gaoyuan Real Estate Appraisal Firm (2) Hsieh Kun-Lung, Appraiser, Zhongtai Real Estate Appraisal Firm 9. Real estate appraiser's license number: (1) Appraiser Chen Pi-Yuan: (98) Yilan County Appraisal No. 000020 (2) Appraiser Hsieh Kun-Lung: (105) Taipei City Appraisal No. 000228 10. Specific purpose of acquisition: Development and construction for sale 11. Opinions of directors who dissented from this transaction: None 12. Is this transaction a related party transaction: No 13. Date of approval by supervisor or audit committee: May 13, 2026 (Republic of China calendar year 115) 14. Is the appraisal report for limited price, specific price, or special price: No or not applicable 15. Is the appraisal report not yet obtained: No or not applicable 16. Reason for not yet obtaining the appraisal report: Not applicable 17. If there is a material difference in the appraisal results, the reason for the difference and the opinion of the CPA: Not applicable 18. Name of accounting firm: Not applicable 19. Name of CPA: Not applicable 20. CPA's license number: Not applicable 21. Date of previous significant announcement regarding the same event: Not applicable 22. Other matters to be specified: None