【China Steel Chemical Corporation】The Company's donation to China Steel Group Education Foundation

1. Date of occurrence of the event: 2026/04/28 2. Reason for donation: To enhance the group's image, fulfill social responsibility, and promote social welfare 3. Donation amount: NTD 500,000 4. Beneficiary: China Steel Group Education Foundation 5. Relationship with the company: The parent company is the main donor 6. Name and resume of independent directors who expressed opposition or reservation: None 7. Opinions of the aforementioned independent directors who expressed opposition or reservation: None 8. Other matters to be specified: None