Research and development of environmental protection technologies; environmental protection engineering and municipal engineering; landscaping; disinfection services; urban road sewer pipe unclogging and cleaning; technology development and consulting for garbage collection, transportation, and disposal; research and development and sales of environmental protection equipment; acquisition, storage, sorting, packaging, and sales of recyclable resources; technology development and sales of sanitation equipment, environmental protection specialized vehicles, wastewater treatment products, and odor treatment products; sweeping, collection, and transportation of urban road household waste (operations involving prior administrative permits require obtaining the permit before operation); sales of non-edible vegetable oil; research and development of resource recycling technologies; sales of non-ferrous metal alloys; sales of metal chains and other metal products; sales of electronic components and electromechanical component equipment. Processing and production of garbage collection and compression equipment, wastewater treatment process equipment, and odor treatment process equipment; collection and transportation of fecal sludge and wastewater; production of organic fertilizers; commercial collection, transportation, and disposal of kitchen waste; general freight; solid waste collection and transportation (operations involving prior administrative permits require obtaining the permit before operation); disposal of waste electrical and electronic products.