1721 Sunko

Release Date: July 20, 2026 Statement Date: July 19, 2026 Statement Time: 07:00:04 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 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) Date of Approval for Name Change / Event Date: June 29, 2026 (2) Approval Document Number: 11530099260 (3) Shareholders' Meeting Resolution Date for Name Change: June 16, 2026 (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 registration on July 1, 2026. (2) According to Article 45 of the Taiwan Stock Exchange Corporation Business Rules, the company must publish a continuous announcement 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."