Research and development of resource recycling technologies; Research and development of harmless utilization technologies for agricultural and forestry waste; Development of artificial intelligence application software; Development of artificial intelligence basic software; Technical consulting services for artificial intelligence public service platforms; Network technical services; Internet data services; Big data services; Information system operation and maintenance services; Processing of renewable resources; Recycling of renewable resources (excluding productive scrap metal); Manufacturing of paper products; Sales of renewable resources; Sales of paper products; Manufacturing of plastic products; Sales of plastic products; Operational services for rural household waste; Environmental sanitation management (excluding environmental quality monitoring, pollution source inspection, and disposal services for urban household waste, construction waste, and kitchen waste); Processing of biomass fuels; Sales of biomass成型 fuels; Professional cleaning, washing, and disinfection services; Road freight transportation for general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); Domestic freight forwarding; Retail of stationery; Sewage treatment and its recycling; Marketing planning; Sales of chemical products (excluding licensed chemical products); Manufacturing of household waste treatment equipment; Import and export of goods; Experiential expansion activities and planning; Leisure and sightseeing activities; Harmless treatment of recycled food; Installation services for environmental sanitation public facilities. Licensed items: Operational services for urban household waste.