岱勒新材：黎辉新材的产品高纯石英砂主要在进行中、内层技术研发生产及客户验证

Core Viewpoint - Daili New Materials (300700) is currently engaged in the research and production of high-purity quartz sand, with a focus on middle and inner layer technology development and customer validation [1] Group 1 - The purity of the middle and inner layer sand is reported to be between 4N8 and 5N5 [1]