石英股份：合成石英砂研发进展顺利，目前处于中试阶段

Group 1 - The core viewpoint of the article is that the company, Quartz Co., Ltd. (603688.SH), is making significant progress in the research and development of synthetic quartz sand, which is currently in the pilot testing phase [1] - The construction of the production line is proceeding as planned, indicating a structured approach to scaling operations [1] - Future production capacity will be dynamically adjusted based on market demand and order conditions, reflecting a responsive business strategy [1]