[Cheng Uei] Announcement of the contents of the material information press conference held by the company

1. Date of occurrence of the event: 2026/05/13 2. Company name: Cheng Uei Precision Industry Co., Ltd. 3. Relationship with the company (please enter "this company" or "subsidiary"): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: The board of directors of our subsidiary, PrimeVOLT Energy (6806), approved the 2026 first quarter financial report on the 13th. Due to the impact of the overall operating environment and changes in capital market funding arrangements, it is no longer able to support the continued operation of its subsidiary, Power Marine. Power Marine also lacks the ability to repay its debts, leading PrimeVOLT Energy and Fuwei Energy to recognize losses related to their endorsements and loans to Power Marine. This resulted in the net assets attributable to owners of the parent company turning negative in the 2026 first quarter financial report. Our company also recognized losses in proportion to its 24.87% shareholding. Our core business operations remain stable and unaffected. The financial report will be published after review and approval by our board of directors. 6. Countermeasures: None 7. Other matters to be explained (if the subject of the event or resolution is a public company or above, this material information also falls under the scope of Article 7, Paragraph 9 of the Enforcement Rules of the Securities Exchange Act, which significantly affects shareholders' equity or securities prices): None Keywords: Material Information