【Longda】Announcement of Corporate Briefing Meeting Information

Pursuant to Clause 4, Item XX: 12 Date of Fact: 2026/06/24

1. Date of Corporate Briefing Meeting: 2026/06/24 2. Time of Corporate Briefing Meeting: 14:00 3. Location of Corporate Briefing Meeting: Conference Room, 19F.-1, No. 380, Minquan 2nd Road, Cianjhen District, Kaohsiung City 4. Summary of Briefing Meeting: Company introduction and operational status update 5. Other Matters to be Disclosed: None

For complete financial and business information, please visit the public information observation station under the corporate briefing meeting schedule or related sections.