万润股份：公司PEI材料可用于航空航天复合材料制造领域

Group 1 - The core viewpoint of the article is that Wanrun Co., Ltd. has highlighted the excellent performance of its PEI materials in terms of temperature resistance, mechanical strength, and chemical stability, making them suitable for aerospace composite material manufacturing [2] Group 2 - The company responded to investor inquiries on an interactive platform, emphasizing the applications of its PEI materials in the aerospace sector [2]