1721 Sunko Announces Corporate Name Change to Guoqing Technology

Release Date: July 16, 2026 Statement Date: July 15, 2026 Statement Time: 07:00:04 Company Code: 1721 Company Name: Sunko Subject: Announcement of the company name change from 'Sunko Co., Ltd.' to 'Guoqing Technology Co., Ltd.', with the announcement period from July 1, 2026 to September 30, 2026. Applicable Clause: Item 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 with Company:本公司 (This Company) 4. Cross-shareholding Ratio: Not applicable 5. Reasons for Change: (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. Countermeasures: None 7. Other Matters to be Disclosed: (1) The company received the Ministry of Economic Affairs' approval letter for change registration on July 1, 2026. (2) According to Article 45 of the Operating Rules of Taiwan Stock Exchange Corporation, the company must 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 and continues to be 'SUNKO INK CO., LTD.'