Sunko Co., Ltd. Announces Name Change to Guoqing Technology Co., Ltd.

Release Date: July 23, 2026 Statement Date: July 22, 2026 Statement Time: 7:00:03 Company Code: 1721 Company Name: Sunko Subject: Announcement of company name change from 'Sunko Co., Ltd.' to 'Guoqing Technology Co., Ltd.', with announcement period from July 1, 2026 to September 30, 2026.

Applicable Clause: Clause 51 Event Date: June 29, 2026

Details: 1. Event Date: June 29, 2026 (Minguo Year 115) 2. Company Name: Guoqing Technology Co., Ltd. (formerly Sunko Co., Ltd.) 3. Relationship to Company (please enter '本公司' or 'subsidiary'):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Event: (1) Approval Date of Company Name Change / Event Date: June 29, 2026 (Minguo Year 115) (2) Approval Document Number for Name Change: 11530099260 (3) Shareholders' Meeting Resolution Date for Name Change: June 16, 2026 (Minguo Year 115) (4) Previous Company Name: Sunko Co., Ltd. (5) New Company Name: Guoqing Technology Co., Ltd. (6) Previous Company Abbreviation: Sunko (7) New Company Abbreviation: Guoqing Technology 6. Response Measures: None 7. Other Matters to be Disclosed: (1) The company received the Ministry of Economic Affairs' approval letter for change of registration on July 1, 2026. (2) According to Article 45 of the Rules of Operation of Taiwan Stock Exchange Corporation, the company is required to make continuous announcements for three months following the name change. (3) The company's stock code remains unchanged; ordinary shares continue to be listed under '1721'. (4) The company's English name remains unchanged as 'SUNKO INK CO., LTD.'