【Hongshuo】Subsidiary Announcement: Suzhou Hongshuo Board Approves Cash Capital Increase by 'Hongshuo Precision Electric (Suzhou) Co., Ltd.' to 'Hongshuo Precision Electric (Hubei) Co., Ltd.'

1. Date of Fact: From June 16, 2026 (Minguo Year 115) to June 16, 2026 (Minguo Year 115) 2. Method of New (or Reduced) Investment: Cash Capital Increase 3. Board Approval Date: June 16, 2026 (Minguo Year 115) 4. Other Approval Dates: Not Applicable 5. Number of Transaction Units, Unit Price, and Total Transaction Amount: Total Transaction Amount: RMB 20 million (approximately NT$92,640,000) 6. Name of Investee Company in Mainland China: Hongshuo Precision Electric (Hubei) Co., Ltd. 7. Paid-in Capital of the Above-mentioned Mainland Investee Company: RMB 220 million 8. Proposed New Capital Increase Amount for the Above-mentioned Mainland Investee Company: RMB 20 million 9. Main Business Activities of the Above-mentioned Mainland Investee Company: Manufacturing and operating copper products, 3C product connecting cables, signal cables, electric vehicle charging guns, high-voltage cables, and new energy materials 10. Auditor's Opinion Type on the Most Recent Financial Statements of the Above-mentioned Mainland Investee Company: Not Applicable 11. Total Equity on the Most Recent Financial Statements of the Above-mentioned Mainland Investee Company: As of December 31, 2025 (Minguo Year 114), total equity was RMB 123,447 thousand 12. Net Profit or Loss on the Most Recent Financial Statements of the Above-mentioned Mainland Investee Company: Net loss after tax for the year 2025 (Minguo Year 114) was RMB 60,805 thousand 13. Cumulative Actual Investment Amount in the Above-mentioned Mainland Investee Company to Date: RMB 220 million 14. Counterparty and Its Relationship with the Company: 100% owned parent-subsidiary relationship 15. If the Counterparty is a Related Party, State the Reason for Selecting the Related Party as the Counterparty, the Previous Transferor, the Relationship Between the Previous Transferor and the Company and the Counterparty, the Previous Transfer Date, and the Transfer Amount: Not Applicable 16. If the Owner of the Transaction Subject Was a Related Party of the Company Within the Last Five Years, State the Acquisition and Disposal Dates, Price, and Relationship with the Company at the Time: Not Applicable 17. Gain (or Loss) from Disposal: Not Applicable 18. Delivery or Payment Terms (Including Payment Period and Amount), Contractual Restrictive Clauses, and Other Important Agreements: Funds to be remitted based on funding needs 19. Decision Method of the Transaction, Reference Basis for Price Determination, and Decision-Making Unit: Decision Method: Cash Capital Increase; Reference Basis for Price Determination: Not Applicable; Decision-Making Unit: Board of Directors 20. Broker: Not Applicable 21. Specific Purpose of Acquisition or Disposal: For operational expansion and long-term business development needs 22. Dissenting Directors' Opinions on the Transaction: None 23. Whether the Transaction is a Related-Party Transaction: Yes 24. Date of Supervisor's Approval or Audit Committee's Consent: Not Applicable 25. Cumulative Total Investment Amount Approved by the Investment Commission for Mainland China (Including This Investment) to Date: As of now, the total investment amount approved by the Ministry of Economic Affairs' Investment Commission is NT$636,262 thousand 26. Ratio of the Above-mentioned Approved Investment Amount to the Paid-in Capital in the Most Recent Financial Statements: 59.66% 27. Ratio of the Above-mentioned Approved Investment Amount to Total Assets in the Most Recent Financial Statements: 12.72% 28. Ratio of the Above-mentioned Approved Investment Amount to Equity Attributable to Owners of the Parent in the Most Recent Financial Statements: 47.14% 29. Cumulative Actual Investment Amount in Mainland China to Date: As of now, the total actual investment amount in Mainland China is NT$305,952 thousand 30. Ratio of the Above-mentioned Actual Investment Amount to Paid-in Capital in the Most Recent Financial Statements: 28.69% 31. Ratio of the Above-mentioned Actual Investment Amount to Total Assets in the Most Recent Financial Statements: 6.12% 32. Ratio of the Above-mentioned Actual Investment Amount to Equity Attributable to Owners of the Parent in the Most Recent Financial Statements: 22.67% 33. Investment Gains or Losses Recognized in Mainland China Over the Past Three Years: Year 2023 (Minguo 112): Investment loss of NT$145,913 thousand; Year 2024 (Minguo 113): Investment loss of NT$248,452 thousand; Year 2025 (Minguo 114): Investment loss of NT$442,536 thousand 34. Profit Repatriation Amounts from Mainland China Over the Past Three Years: Year 2023 (Minguo 112): NT$0 thousand; Year 2024 (Minguo 113): NT$0 thousand; Year 2025 (Minguo 114): NT$0 thousand 35. Whether Auditors Issued a Non-Reasonable Opinion on This Transaction: Not Applicable 36. Name of Auditor Firm: Not Applicable 37. Name of Auditor: Not Applicable 38. Auditor's Practice Certificate Number: Not Applicable 39. Previous Date of Material Information Disclosure on the Same Event: Not Applicable 40. Other Explanatory Matters: None