2323 Chung Hsing Electric Machine & Engineering Corp.

Announcement Date: June 23, 2026 Statement Date: June 22, 2026 Statement Time: 17:50:15 Company Code: 2323 Company Name: Chung Hsing Electric Machine & Engineering Corp. Subject: The company announces the acquisition of securities. Applicable Clause: Clause 20 Factual Date: June 22, 2026 Details: 1. Security Name: Nanya Technology Common Stock 2. Transaction Date: June 11, 2026 – June 22, 2026 3. Board Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by Chairman June 22, 2026 5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity (in thousands of shares): 720 Unit Price (NT$): 417.30 Total Transaction Amount (NT$): 300,458,817 6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable 7. Relationship with the Target Company: None 8. Cumulative Holdings (including this transaction) to date: Holding Balance: 334,000 shares, Amount: NT$121,113,605 Ownership Ratio: 0.01%, Rights Restrictions (e.g., pledge): None 9. Ratio of securities investments listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to total assets and equity attributable to parent company owners in the latest financial statements, and operating capital amount: Ratio to Total Assets: 82.21% Ratio to Equity Attributable to Parent Owners: 118.07% Operating Capital Amount: NT$8,285,327 thousand 10. Specific Purpose of Acquisition or Disposal: Portfolio investment 11. Directors' Dissenting Opinions on this Transaction: None 12. Whether this Transaction is a Related-Party Transaction: No 13. Counterparty and 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 Explanatory Matters: On March 31, 2026, authorized traders were approved to conduct securities transactions on the centralized market during the second quarter of 2026.