[Huang Chang] Announcement on the Election of Chairman by the Board of Directors

1. Date of Board of Directors resolution or change date: June 17, 2026 2. Position (Chairman or General Manager): Chairman 3. Former incumbent's name: Jiang Cheng-jin 4. Former incumbent's resume: Chairman of Huang Chang Construction Co., Ltd. 5. New incumbent's name: Jiang Cheng-jin 6. New incumbent's resume: Chairman of Huang Chang Construction Co., Ltd. 7. Situation of change: Expiration of term 8. Reason for change: Re-election upon term expiration 9. Effective date of new term: June 17, 2026 10. Other matters: None