General project: Sales of building materials; Research and development of new material technology; Manufacturing of plastic products; Sales of lightweight building materials; Manufacturing of new building materials (excluding hazardous chemicals); Sales of rubber products; New material technology promotion services; Manufacturing of high-performance fibers and composite materials; Manufacturing of insulation and sound insulation materials; Sales of insulation and sound insulation materials; Sales of high-performance non-ferrous metals and alloy materials; Sales of plastic products; Sales of new catalytic materials and additives; Manufacturing of ecological and environmental materials; Sales of ecological and environmental materials; Sales of enamel products; Sales of new membrane materials; Sales of high-performance sealing materials; Sales of insulation materials; Sales of non-metallic minerals and products; Retail of hardware products; Engineering management services. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed projects: Construction professional operations; Construction engineering design; Construction project construction. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or permits issued by relevant departments. )