Rainbow Crown Electronics Announces New Endorsement Guarantee Amount Reaching Article 25, Paragraph 2, Clause 2, 3, and 4 Standards

1. Event Date: 115/07/30

2. Endorsed Party: (1) Company Name: Wisdom Bright Inc. (2) Relationship with Guarantee Provider: 100% owned subsidiary (3) Guarantee Limit (in thousand NT$): 1,571,610 (4) Previous Guarantee Balance (in thousand NT$): 323,800 (5) Amount of New Guarantee (in thousand NT$): 97,140 (6) Total Guarantee Balance as of Event Date (in thousand NT$): 420,940 (7) Actual Amount Drawn by Endorsed Company (in thousand NT$): 171,614 (8) Reason for New Guarantee: Guarantee for shared bank financing limit between the company and Wisdom Bright Inc.

3. Collateral Provided by Endorsed Company: (1) Description: None (2) Value (in thousand NT$): 0

4. Latest Financial Statements of Endorsed Company: (1) Capital (in thousand NT$): 551,226 (2) Accumulated Profit/Loss (in thousand NT$): 23,563

5. Conditions for Release of Guarantee Liability: (1) Condition: Expiration of bank contract (2) Date: Upon expiration of bank contract

6. Total Guarantee Limit (in thousand NT$): 1,571,610

7. Total Guarantee Balance as of Event Date (in thousand NT$): 420,940

8. Ratio of Guarantee Balance Provided by Company to Net Equity in Latest Financial Statements of Public Company as of Event Date: 26.78

9. Combined Ratio of Guarantee Balance, Long-term Investment, and Fund Lending to Net Equity in Latest Financial Statements of Public Company as of Event Date: 89.31

10. Other Disclosures: The newly added endorsement guarantee amounts to USD 3 million, converted into NT dollars using the Bank of Taiwan's spot exchange rate average of 32.38 on 2026/7/22. The basis for the latest financial statements is the Q1 115 financial report.