长川科技：公司主要从事集成电路专用设备的研发、生产和销售

Group 1 - The company, Changchuan Technology, focuses on the research, development, production, and sales of integrated circuit specialized equipment [2] - It is recognized as a national high-tech enterprise and software enterprise, dedicated to enhancing the technology level of integrated circuit testing equipment in China [2] - The company actively promotes the upgrade of the integrated circuit equipment industry [2]