Dongnan Cement Announces Expiration of Term for Sustainability Committee Members

1. Date of Change: 2026/06/18 2. Name of Functional Committee: Sustainability Committee 3. Former Members: Chen Guan-Hua (Director) Yang Wen-Zai (Independent Director) Ye Jin-Bao (Independent Director) 4. Former Members' Resumes: Chen Guan-Hua (Director): Vice Chairman of Dongnan Cement Co., Ltd. Yang Wen-Zai (Independent Director): Independent Director of Connwin Co., Ltd. Ye Jin-Bao (Independent Director): Prosecutor at the Supreme Prosecutors Office 5. New Members: Not yet appointed 6. New Members' Resumes: Not yet appointed 7. Nature of Change (enter 'resignation', 'dismissal', 'end of term', 'deceased', or 'new appointment'): End of term 8. Reason for Change: The company's board of directors underwent a full re-election on 2026/06/18. 9. Original Term (e.g., xx/xx/xx ~ xx/xx/xx): 2024/05/10 ~ 2026/06/20 10. Effective Date of New Appointment: Not applicable 11. Other Matters to be Disclosed: A board meeting will be convened in accordance with the law to elect new members of the Sustainability Committee. Relevant significant information will be announced upon completion.