大东南：子公司主要新材料包括差异化特种膜产品及正在研发的新产品

Group 1 - The core viewpoint of the article is that Dazhongnan (002263) is actively engaged in the development of differentiated specialty membrane products and new materials through its subsidiary Hangzhou Dazhongnan High-tech New Materials Co., Ltd [1] Group 2 - The company is focusing on innovative materials, indicating a strategic direction towards advanced material technology [1]