[ASE Technology] Subsidiary Siliconware Precision Industries Announces Acquisition of Plant Engineering Project

1. Contract type: Plant engineering. 2. Date of occurrence: 115/5/22~115/5/25. 3. Date of Board approval: N/A. 4. Other approval date: General Manager approval, May 25, 115. 5. Counterparty and relationship: Li-Ming Construction Co., Ltd., no relationship. 6. Main contract content: Total amount NT$2,707,756,681; Duration 115/5/22 to 116/9/30. 7. Professional appraiser: N/A. 8. Appraiser name: N/A. 9. Appraiser license: N/A. 10. Purpose: For production and operations. 11. Dissenting opinions: None. 12. Related party transaction: No. 13. Audit committee approval: N/A. 14. Special price: N/A. 15. Appraisal report status: N/A. 16. Reason for no report: N/A. 17. Significant differences: N/A. 18. Accounting firm: N/A. 19. Accountant name: N/A. 20. Accountant license: N/A. 21. Previous announcement date: N/A. 22. Other notes: None.