Core Viewpoint - The company, Dahongli (300865.SZ), focuses on the research, development, production, and sales of complete sets of equipment for sand and stone, as well as mining crushing and screening [1] Group 1: Business Overview - The main business of the company includes the development, production, and sales of integrated environmental protection intelligent crushing production equipment and overall solutions [1] - The company's products are widely used in infrastructure projects such as transportation, housing construction, urban public construction, and water conservancy and hydropower [1]