Taichung Holdings Announces Guarantee Matters Related to Subsidiary Guangshang Technology (Guangzhou) Co., Ltd.

1. Fact date: 115/04/07 2. Company name of the guaranteed party: (1) Company name: Caizhong Brain (Shenzhen) Co., Ltd. (2) Relationship with the company providing the guarantee: Wholly-owned subsidiary. (3) Guarantee limit (thousands of NT$): 1,523,893 (4) Remaining balance of original guarantee (thousands of NT$): 1,157,250 (5) Amount of new guarantee added (thousands of NT$): 1,160,500 (6) Balance of guarantee up to the fact date (thousands of NT$): 2,317,750 (7) Actual amount drawn by the guaranteed company (thousands of NT$): 0 (8) Reason for new guarantee: Bank financing guarantee. 3. Collateral provided by the guaranteed company: (1) Content: None (2) Value (thousands of NT$): 0 4. Latest financial statement of the guaranteed company: (1) Capital (thousands of NT$): 711,492 (2) Accumulated profit/loss (thousands of NT$): 267,576 5. Conditions for releasing guarantee liability: (1) Condition: Repayment of the loan. (2) Date: Until the company provides written notice of termination or the company no longer renews the agreement. 6. Total guarantee limit (thousands of NT$): 23,654,220 7. Guarantee balance up to the fact date (thousands of NT$): 3,119,190 8. Up to the fact date, the ratio of the guarantee balance to the net worth of the publicly issued company's latest financial statement: 65.20 9. Up to the fact date, the ratio of the sum of guarantees, long-term investments, and fund lending to the net worth of the publicly issued company's latest financial statement: 114.20 10. Other matters to be noted: This guarantee was resolved by the board of directors in advance and will become effective after the shareholders' meeting resolution date of April 23, 2026.