General project: Sales of chemical products (excluding licensed chemical products); Sales of coatings (excluding hazardous chemicals); Sales of building decoration materials; Sales of building materials; Labor services (excluding labor dispatch); Engineering management services; Engineering and technical services (excluding planning management, survey, design, and supervision); Installation services for ordinary mechanical equipment; Information consulting services (excluding licensed information consulting services); Information technology consulting services; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Sales of building waterproofing membrane products; Sales of anti-corrosion materials; Sales of insulation materials; Sales of specialized equipment for environmental protection; Sales of pumps and vacuum equipment; Sales of mechanical equipment; Sales of mechanical and electrical equipment; Sales of pipeline transportation equipment; Sales of painting equipment; Sales of security equipment; Sales of specialized equipment for plastic processing; Sales of electronic components and electromechanical equipment; Sales of metal cutting and welding equipment; Sales of electronic specialized equipment; Sales of metallurgical specialized equipment; Design and construction services for security technology prevention systems; Environmental protection monitoring; Environmental consulting services; Mechanical equipment leasing; Spray processing. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license) Licensed project: Construction labor subcontracting; Construction project design; Construction project construction; Demolition of buildings (excluding blasting operations). (For projects that require approval by 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 licenses issued by the relevant departments. )