黄山谷捷：公司是一家从事功率半导体模块散热基板研发、生产和销售的企业

Group 1 - The core viewpoint of the article is that Huangshan Gujie (301581) has successfully achieved "domestic substitution" in the power semiconductor module heat sink substrate industry [1] Group 2 - The company is engaged in the research, production, and sales of power semiconductor module heat sink substrates [1] - The company's products are important components of IGBT power modules [1]