1721 Sunko Announces Company Name Change to Guoqing Technology Co., Ltd.

Release Date: July 9, 2026 Statement Date: July 8, 2026 Statement Time: 7:00:04 AM 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 Effective Date: June 29, 2026 Details: 1. Effective Date: June 29, 2026 2. New Company Name: Guoqing Technology Co., Ltd. (formerly Sunko Co., Ltd.) 3. Relationship to Company:本公司 (This Company) 4. Cross-shareholding Ratio: Not applicable 5. Reasons for Change: (1) Date of approval for name change / Effective 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 Rules Governing the Operations 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."