2535 Tachi-Hsin Engineering: Board Approves Removal of Non-Competition Clause for Executive

Announcement Date: July 21, 2026 Statement Date: July 20, 2026 Statement Time: 17:20:03 Company Code: 2535 Company Name: Tachi-Hsin Engineering Co., Ltd. Subject: Board Approval of Executive's Non-Competition Clause Removal Applicable Clause: Clause 21 Event Date: July 20, 2026

Details: 1. Board Resolution Date: July 20, 2026 2. Name and Title of Executive Permitted to Engage in Competitive Activities: Hsu Wei-Chen, Senior Vice President / Chief Accounting Officer, Corporate Governance Officer, and Acting Spokesperson 3. Nature of Permitted Competitive Activities: Engagement in companies with business scopes identical or similar to the company's 4. Duration of Permitted Competitive Activities: During the period of serving as an executive 5. Resolution Outcome (as per Article 32 of the Company Act): The proposal was approved unanimously after the chairperson confirmed no objections from all attending directors. 6. Name and Title of Executive Engaging in Competitive Activities in Mainland China-based Enterprises (if not applicable, state "Not Applicable"): Not Applicable 7. Name and Position Held in Mainland China-based Enterprise: Not Applicable 8. Address of Mainland China-based Enterprise: Not Applicable 9. Business Scope of Mainland China-based Enterprise: Not Applicable 10. Impact on Company's Financial and Business Operations: None 11. If the Executive Invests in Mainland China-based Enterprises, Investment Amount and Shareholding Ratio: Not Applicable 12. Other Matters to be Disclosed: None