[Hsin Kao] Announcement of Changes to Corporate Directors and Independent Directors

1. Date of change: June 5, 115 2. Personnel category (Corporate Director, Independent Director): Corporate Director, Independent Director 3. Former incumbents: Corporate Director: Tong De Investment Co., Ltd. - Chen Chien-Tung Corporate Director: Tong De Investment Co., Ltd. - Chuang Wen-Yuan Corporate Director: Tong De Investment Co., Ltd. - Huang Chin-Hsiung Corporate Director: Veterans Affairs Council - Wang Chi-Kai Corporate Director: Veterans Affairs Council - Liu Ya-Kuei Corporate Director: Hsin Chuan Investment Co., Ltd. - Sun Lien-Sheng Independent Directors: Chen Po-Hsun, Fang Wei-Lien, Chi Ya-Chi 4. Profiles of former incumbents: Chen Chien-Tung: Chairman, Hsin Kao Gas Chuang Wen-Yuan: Chairman, Tong De Investment Huang Chin-Hsiung: Vice President, Hsin Kao Gas Wang Chi-Kai: Director, Kaohsiung Veterans Service Center Liu Ya-Kuei: Director, Kaohsiung Veterans Service Center Sun Lien-Sheng: Deputy Commander of the Air Force Chen Po-Hsun: Chairman, Tai-Pau High Precision Imaging Fang Wei-Lien: Partner, Wen-Ching CPA Office Chi Ya-Chi: Director, Infostar Co., Ltd. 5. New incumbents: Corporate Director: Tong De Investment Co., Ltd. - Chen Chien-Tung Corporate Director: Tong De Investment Co., Ltd. - Chuang Wen-Yuan Corporate Director: Tong De Investment Co., Ltd. - Huang Chin-Hsiung Corporate Director: Veterans Affairs Council - Wang Chi-Kai Corporate Director: Veterans Affairs Council - Liu Ya-Kuei Corporate Director: Hsin Chuan Investment Co., Ltd. - Sun Lien-Sheng Independent Directors: Fang Wei-Lien, Chi Ya-Chi, Cheng Wan-Chen 6. Profiles of new incumbents: Same as above, plus: Cheng Wan-Chen: Senior ESG Consultant, Edi-S Consultant Co., Ltd. 7. Reason for change: Expiration of term 8. Shares held upon election: Provided detailed breakdown. 9. Effective date: June 5, 115