Subsidiaries of Kejia-KY Announce Cumulative Acquisition of Securities Exceeding 20% of Paid-in Capital

Announcement Date: July 24, 2026 Statement Date: July 23, 2026 Statement Time: 17:00:56 Company Code: 5215 Company Name: Kejia-KY Subject: Announcement on behalf of subsidiaries Suzhou Jiaji, Kede, Jiacai, Aipulai, Baihong, Jiahuang, and Jiajun

Public disclosure of cumulative acquisition of the same marketable securities exceeding 20% of paid-in capital within one year. Applicable Clause: Item 20 Event Date: July 23, 2026

Details: 1. Security Name: One-day Government Bond Reverse Repurchase (GC001), code 204001, Shanghai Stock Exchange

2. Transaction Date: July 23, 2026 ~ July 23, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 23, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Aipulai: 83,990 units, average rate: 1.315% Baihong: 102,670 units, average rate: 1.320% Jiacai: 400,460 units, average rate: 1.315% Jiahuang: 210,060 units, average rate: 1.315% Jiaji: 120,120 units, average rate: 1.315% Kede: 217,370 units, average rate: 1.315% Jiajun: 381,190 units, average rate: 1.315% Total Amount: 151,586 thousand RMB (approximately TWD 709,303 thousand)

6. Gain (or loss) on disposal (not applicable for acquisition of securities): Not applicable

7. Relationship with the counterparty company: Unrelated party

8. Cumulative holdings of the security (including this transaction) to date—quantity, amount, ownership percentage, and restricted rights (e.g., pledge status): Aipulai: 83,990 units, average rate: 1.315% Baihong: 102,670 units, average rate: 1.320% Jiacai: 400,460 units, average rate: 1.315% Jiahuang: 210,060 units, average rate: 1.315% Jiaji: 120,120 units, average rate: 1.315% Kede: 217,370 units, average rate: 1.315% Jiajun: 381,190 units, average rate: 1.315% Pledge Status: None

9. Cumulative securities investments under Article 3 of the 'Regulations on the Acquisition or Disposition of Assets by Publicly Issued Companies' (including this transaction), as a percentage of total assets and equity attributable to owners of the parent in the latest financial statements, and the amount of working capital: Percentage of total assets: 14.25% Percentage of shareholders' equity: 19.85% Working capital: TWD 2,612,388 thousand

10. Specific purpose of the acquisition or disposition: Investment and financial management

11. Directors who expressed dissenting opinions on this transaction: None

12. Is this a related-party transaction: No

13. Counterparty and its relationship with the company: Not applicable

14. Date of supervisor approval or audit committee consent: Not applicable

15. Previous date of material information disclosure on the same event: Not applicable

16. Other remarks: None