General items: Technical services, technology development, technology consultation, technology exchange, technology transfer, technology promotion; Environmental consulting services; Environmental protection monitoring, soil pollution treatment and remediation services, sewage treatment and its recycling; Crop pest and disease control services; Landscape greening construction; Engineering management services; Sales of environmental protection special equipment; Sales of gas and liquid separation and purification equipment; Household appliance sales; Home goods sales; Electronic product sales; Metal product sales; Metal material sales; Wholesale of medical staff protection supplies; Retail of medical staff protection supplies, sales of mechanical equipment, daily chemical product sales; Glass fiber and products sales; Management consulting for enterprises; Non-residential real estate leasing; General mechanical equipment installation services; Maintenance of electronic and mechanical equipment (excluding special equipment); Import and export; Technology import and export; Agency for import and export (except for projects that must be approved by relevant authorities, business activities can be carried out within the scope permitted by the business license); Permitted projects: Urban domestic waste operating services; Construction project supervision; Construction project construction; Construction project design; Disinfection equipment sales, third-class medical device operation; Third-class medical device leasing; (Projects that require approval shall be carried out after obtaining the approval from relevant authorities; Specific business items shall be in accordance with the approved documents or licenses issued by the relevant authorities)