General items: Domestic trade agency; Sales of packaging materials and products; Sales of ecological and environmental materials; Sales of machinery and equipment; Mechanical and electrical equipment manufacturing; Sales of special equipment for packaging; Packaging special equipment manufacturing; Food sales (only pre-packaged food products are sold); Food import and export; Internet sales of food (only pre-packaged food products are sold); Import and export of goods; Technology import and export; Import and export agent; General mechanical equipment installation services; Sales of mechanical parts and parts; Food with plastic packaging containers tool products sales. (except for projects that must be approved according to law, independently carry out business activities according to law on the basis of business license) permitted projects: Production of plastic packaging containers and tool products for food; Food sales. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, and the specific business projects shall be subject to the approval documents or permits of relevant departments)