2323 Chung Hsing Acquires Securities in Nanya Technology

Announcement Date: July 17, 2026 Statement Date: July 16, 2026 Statement Time: 17:51:36 Company Code: 2323 Company Name: Chung Hsing Subject: Announcement of the Company's Acquisition of Securities Applicable Clause: Clause 20 Factual Date: July 16, 2026

1. Security Name: Nanya Technology Ordinary Shares

2. Transaction Date: July 15–16, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Chairman Approval July 16, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 1,820 Unit Price (NT$): 453.79 Total Transaction Amount (NT$): 825,891,646

6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Restricted Rights (e.g., pledge status): Holdings: 3,196,000 shares, Amount: NT$1,405,059,802 Ownership Percentage: 0.09%, Restricted Rights: None

9. Proportion of Securities Investments (including this transaction) Listed under Article 3 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies' to the Company's Total Assets and Equity Attributable to Owners of the Parent in the Most Recent Financial Statements, and the Amount of Working Capital in the Most Recent Financial Statements: Percentage of Total Assets: 85.98% Percentage of Equity Attributable to Owners of the Parent: 123.48% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of the Acquisition or Disposal: Investment portfolio management

11. Dissenting Director's Opinion on This Transaction: None

12. Whether This Transaction is 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 Major Information Disclosure on the Same Event: Not applicable

16. Other Explanatory Matters: Authorized designated traders on June 30, 2026 to conduct securities transactions in the centralized market during the third quarter of 2026