[Hong Shuo] Announcement regarding endorsement guarantee by major subsidiary 'Hong Shuo Precision Electronics (Suzhou)' to 'Hong Shuo Precision Electronics (Hubei)'

1. Date of event: 2026/06/03 (Note: 115/06/03 converted to Gregorian)
2. Endorsed company:
(1) Company name: Hong Shuo Precision Electronics (Hubei) Co., Ltd.
(2) Relationship: A wholly-owned subsidiary of Hong Shuo Precision Electronics (Suzhou) Co., Ltd.
(3) Limit of guarantee (in thousands of TWD): 819,959
(4) Previous balance of guarantee (in thousands of TWD): 641,532
(5) Additional guarantee amount this time (in thousands of TWD): 97,272
(6) Total balance of guarantee as of this event (in thousands of TWD): 738,804
(7) Actual amount utilized by the endorsed company (in thousands of TWD): 234,592
(8) Reason for additional guarantee: Long-term working capital requirements, provided by the parent company as guarantor.
3. Collateral provided:
(1) Description: None
(2) Value (in thousands of TWD): 0
4. Latest financial statements of the endorsed company:
(1) Capital (in thousands of TWD): 1,018,380
(2) Accumulated profit/loss (in thousands of TWD): -512,447
5. Conditions for releasing the guarantee:
(1) Condition: Maturity of the loan agreement
(2) Date: Maturity of the loan agreement
6. Total guarantee limit (in thousands of TWD): 2,699,688
7. Total balance of guarantee as of this event (in thousands of TWD): 1,940,617
8. Ratio of guarantee balance to net worth of the listed company in the latest financial report: 143.77%
9. Ratio of total balance of guarantees, long-term investments, and fund loans to net worth of the listed company in the latest financial report: 191.12%
10. Other notes: Approved by the Board of Directors of Hong Shuo (Suzhou) on June 3, 2026.