上纬新材：公司生产经营未发生重大变化，股票复牌

Group 1 - The company's main business remains focused on the research, production, and sales of environmentally friendly high-performance corrosion-resistant materials, materials for wind turbine blades, new composite materials, and circular economy materials, with no significant changes reported [1] - The company's production and operations have not experienced any major changes, and the market environment or industry policies have not undergone significant adjustments [1] - The company's stock is set to resume trading on August 5, 2025 [1]