Hung Sheng, Subsidiary of Sheng Yi, Announces Expansion of Zhangbin Plant Phase II for Electronic-Grade Isopropyl Alcohol Production

Announcement Date: July 18, 2026 Statement Date: July 17, 2026 Statement Time: 17:15 Company Code: 1773 Company Name: Sheng Yi Subject: Announcement of Zhangbin Plant Phase II Expansion Project by subsidiary Hung Sheng Company Applicable Clause: Clause 15 Factual Date: July 17, 2026

Details: 1. Board or Shareholders' Meeting Resolution Date: July 17, 2026 2. Investment Plan Content: Construct two additional production lines for electronic-grade isopropyl alcohol within the Zhangbin Industrial Park. 3. Estimated Investment Amount: NT$1.233 billion 4. Estimated Investment Date: Third quarter of 2026 5. Source of Funds: Internal funds and bank financing 6. Specific Purpose: Expand production capacity of electronic-grade solvents to meet customer demand 7. Other Matters to be Disclosed: Investment will be made progressively according to construction progress.