[DingZing] Announcement of Conversion Price Adjustment for the 1st Domestic Secured Convertible Bond

1. Date of occurrence of the event: June 5, 2026 2. Company name: DingZing Advanced Materials Inc. 3. Relationship to the Company (please enter "the company" or "subsidiary"): The Company 4. Reciprocal shareholding ratios: N/A 5. Cause of occurrence: Due to the company's ex-dividend operation, the conversion price is adjusted in accordance with the issuance and conversion rules of the company's first domestic secured convertible bond. 6. Countermeasures: In accordance with Article 11 of the issuance and conversion rules of the company's first domestic secured convertible bond, the conversion price is adjusted. Effective from the ex-dividend record date (July 1, 2026), the conversion price will be adjusted from NT$110.9 to NT$106.3. 7. Any other matters that need to be specified (if the subject of the event or resolution is a public reporting company or above, whether this material information also meets the criteria for matters that have a significant impact on shareholder equity or securities prices as stipulated in Subparagraph 9, Article 7 of the Securities and Exchange Act Enforcement Rules): None.