1721 Sunko

Release Date: July 14, 2026 Statement Date: July 13, 2026 Statement Time: 07:00:03 Company Code: 1721 Company Name: Sunko Subject: Announcement of the company name change from "Sunko Co., Ltd." to "Guoqing Technology Co., Ltd." Announcement Period: July 1, 2026 to September 30, 2026. Applicable Clause: Item 51 Event Date: June 29, 2026 Details: 1. Event Date: June 29, 2026 2. New Company Name: Guoqing Technology Co., Ltd. (Formerly: Sunko Co., Ltd.) 3. Relationship with Company: Our Company 4. Cross-shareholding Ratio: Not applicable 5. Reasons for Change: (1) Approval Date of 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 notice for change registration on July 1, 2026. (2) According to Article 45 of the Operating Rules of Taiwan Stock Exchange Corporation, a name change requires continuous public announcement for three months. (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."