Manufacturing and sales of electric vehicles (excluding automobiles and tricycles); manufacturing and sales of electric vehicle parts, automobile parts, and agricultural machinery parts; manufacturing, installation, and sales of ventilation equipment, environmental protection machinery equipment, and painting machinery equipment; self-operated and agency import and export business of various commodities and technologies (excluding those restricted or prohibited by the state). Permitted items: intelligent building engineering construction; residential interior decoration. General items: advertising publication; advertising design and agency; disinfectant sales; environmental protection specialized equipment manufacturing; environmental protection specialized equipment sales; specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); landscaping engineering construction; battery sales; fire-fighting equipment sales; metal material sales; pneumatic and electric tool manufacturing; pneumatic and electric tool sales; residential water and electrical installation and maintenance services; advertising production; automobile sales; used car brokerage; intelligent vehicle equipment manufacturing; industrial robot manufacturing; industrial robot sales; special operation robot manufacturing; new material technology research and development; metal packaging container and material manufacturing; high-performance fiber and composite material manufacturing; new material technology promotion services; engineering and technology research and experimental development; professional design services; engineering management services; technology intermediary services; new building material manufacturing (excluding hazardous chemicals); lightweight building material manufacturing; building material sales; rubber product sales; synthetic material sales; chemical product sales (excluding licensed chemical products); mechanical and electrical equipment sales; mechanical equipment sales.