[Quartz Shares: High-purity quartz products for furnace tubes prepared with independent sand have been certified by domestic DRAM IDM manufacturers] On September 2, Quartz Shares stated on the interactive platform that recently, the company's furnace tube series of high-purity quartz products prepared with independent sand have been certified by domestic IDM manufacturers with large-scale DRAM mass production capabilities. The continued advancement of customer certification work at home and abroad will assist the development of the company's semiconductor quartz material business and have positive significance for improving the company's supply chain layout of quartz materials for semiconductors.