General project: Sales of chemical products (excluding licensed chemical products); Sales of metal materials; Sales of specialized chemical products (excluding hazardous chemicals); Sales of building materials; Sales of specialized environmental monitoring instruments and meters; Sales of specialized environmental protection equipment; Sales of electronic products; Environmental consulting services; Technology import and export; Import and export of goods. (Except for projects that require approval according to law, business activities can be conducted independently based on the business license in accordance with the law) Licensed project: Hazardous chemical business. (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. )