6283 Chun-An: Cybersecurity Incident Update

Release Date: July 22, 115 Statement Date: July 21, 115 Statement Time: 17:29:34 Company Code: 6283 Company Name: Chun-An Subject: Explanation of Company's Cybersecurity Incident – Correction of Factual Occurrence Date Applicable Clause: Clause 26 Factual Occurrence Date: July 20, 115

Details: 1. Factual Occurrence Date: July 20, 115 2. Reason for Occurrence: Explanation of the company's cybersecurity incident 3. Handling Process: Upon receiving an abnormal alert, the company's information security unit confirmed it as an encryption attack. The cybersecurity incident response mechanism was immediately activated, and comprehensive detection and protective measures were implemented. Preliminary assessment confirms that internal information systems and the official website are operating normally without material impact. The company will continue to strengthen monitoring and protective measures to ensure information system security and operational stability. 4. Estimated Potential Loss or Impact: Assessed as having no significant impact on company operations. 5. Amount Potentially Eligible for Insurance Claim: Not applicable 6. Improvement Status and Future Response Measures: The company will continue to enhance security controls over its network and information infrastructure to ensure information security. 7. Other Matters to be Disclosed: None