R&D, design, production and sales: purification equipment, filtration equipment, environmental protection equipment, water treatment equipment, industrial waste oil regeneration equipment; leasing and sales: general equipment, hardware and electrical machinery, chemical products and raw materials (excluding hazardous chemicals), low-voltage electrical appliances, electronic products (excluding electronic publications), auto parts, motorcycle parts, import and export of goods and technology. (No business is allowed if prohibited by laws and regulations. If national laws and regulations require approval, business can only be conducted after obtaining a license.)