[Chung-Hsin Environmental] Announcement of Ex-Dividend Date

1. Date of Board/AGM resolution: 2026/05/29 2. Type: Ex-dividend 3. Dividend type and amount: (1) Cash dividend from earnings: 1,356,648,145 TWD, 1 TWD per share. (2) Cash from capital surplus: 271,329,629 TWD, 0.2 TWD per share. 4. Ex-dividend trading date: 2026/06/29 5. Last transfer date: 2026/06/30 6. Book closure start date: 2026/07/01 7. Book closure end date: 2026/07/05 8. Ex-dividend record date: 2026/07/05 9. Last conversion date for bonds: 2026/06/05 10. Conversion suspension start date: 2026/06/09 11. Conversion suspension end date: 2026/07/05 12. Cash dividend payment date: 2026/07/24 13. Other notes: (1) Chairman authorized to handle changes due to capital fluctuations. (2) Bond conversion suspension period: 2026/06/09 to 2026/07/05.