1721 Sunko Announces Company Name Change to Guoqing Technology

Release Date: July 19, 2026 Statement Date: July 18, 2026 Statement Time: 07:00:03 Company Code: 1721 Company Name: Sunko Subject: Announcement of Company Name Change from "Sunko Co., Ltd." to "Guoqing Technology Corporation", 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. New Company Name: Guoqing Technology Corporation (formerly Sunko Co., Ltd.) 3. Relationship to Company: Our Company 4. Cross-shareholding Ratio: Not applicable 5. Reasons for Change: (1) Approval Date of Name Change / Event Date: June 29, 2026 (Minguo 115) (2) Approval Document Number: 11530099260 (3) Shareholders' Meeting Resolution Date for Name Change: June 16, 2026 (Minguo 115) (4) Previous Company Name: Sunko Co., Ltd. (5) New Company Name: Guoqing Technology Corporation (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 notice for change registration on July 1, 2026. (2) According to Article 45 of the Taiwan Stock Exchange Corporation's Business Rules, 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 as "SUNKO INK CO., LTD."