Topco Scientific Co.,Ltd. signed a project contract with the related party. Date of occurrence of the event: February 29, 2024. Counterparty to the contract and relationship with the Company: ECO Technical Services Co.,Ltd. Relationship:100% owned subsidiary.

Major content of the contract, restrictive covenants, and other important terms and conditions: Construction Work: Mechanical Electrical & Plumbing(MEP) Services Procurement Value: TWD 120 million as upper limit. Concrete purpose of the acquisition: For business use. Date of ratification by supervisors or approval by the audit committee: February 29, 2024.