[DingZing] Announcement on the Adjustment of the Conversion Price of the 2nd Domestic Unsecured Convertible Corporate Bond

1. Date of occurrence: 115/06/05 (June 5, 2026) 2. Company name: DingZing Advanced Materials Inc. 3. Relationship to the Company (please enter head office or subsidiary): Head office 4. Reciprocal shareholding ratio: Not applicable 5. Cause of occurrence: Due to the Company's ex-dividend operations, the conversion price is adjusted in accordance with the issuance and conversion rules of the Company's 2nd domestic unsecured convertible corporate bond. 6. Countermeasures: In accordance with Article 11 of the issuance and conversion rules of the Company's 2nd domestic unsecured convertible corporate bond, the conversion price is adjusted from NT$110.7 to NT$106.1, effective from the ex-dividend record date (115/07/01 or July 1, 2026). 7. Any other matters that need to be specified (if the subject of the event or resolution is a public company or above, this material information also meets the matters that have a material impact on shareholders' equity or securities prices as stipulated in Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act): None. Keywords: Material Information