【KOGA-KY】Announcement on behalf of subsidiaries Suzhou Jiaji/Jiacai/Aipulai/Baihong/Jiahuang/Jiajun: Cumulative disposal of the same marketable securities reaching 20% of paid-in capital within one year

1. Securities Name: Shanghai Stock Exchange 3-day reverse repurchase agreement GC003, code 204003. 2. Transaction Date: 2026/4/7~2026/4/7. 3. Board of Directors Approval Date: Not applicable. 4. Other Approval Date: Approval level: Chairman's approval. April 7, 2026 (ROC calendar 115). 5. Transaction Quantity, Unit Price, and Total Transaction Amount: Aipulai: 55,380 units, average price: 1.120%; Baihong: 112,860 units, average price: 1.135%; Jiacai: 1,124,070 units, average price: 1.126%; Jiahuang: 1,697,780 units, average price: 1.119%; Jiaji: 122,590 units, average price: 1.142%; Jiajun: 341,930 units, average price: 1.156%. Total amount: 192,691 thousand NTD (approximately 916,697 thousand TWD). 6. Disposal Profit (or Loss) (not applicable to acquirers of marketable securities): Disposal profit of 29 thousand RMB. 7. Relationship with the Transacting Company: Non-related party. 8. As of now, the cumulative quantity, amount, shareholding ratio, and restricted rights (e.g., pledge status) of this transacted security (including this transaction): Suzhou Aipulai: None; Suzhou Baihong: None; Suzhou Jiacai Electronics: None; Suzhou Jiahuang Electronics: None; Suzhou Jiaji Electronics: None; Chongqing Jiajun: None. Pledge status: None. 9. As of now, the proportion of marketable securities investment (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" to the company's most recent financial report's total assets and equity attributable to owners of the parent, and the amount of working capital in the most recent financial report: Proportion of total assets: 19.40%; Proportion of shareholders' equity: 25.75%; Working capital: 2,515,979 thousand TWD. 10. Specific Purpose of Acquisition or Disposal: Investment and financial management. 11. Opinions of Dissenting Directors on This Transaction: None. 12. This Transaction is a Related Party Transaction: No. 13. Counterparty and Its Relationship with the Company: Not applicable. 14. Date of Approval by Supervisors or Audit Committee: Not applicable. 15. Date of Previous Major Announcement on the Same Event: Not applicable. 16. Other Explanations: None.