Goods import and export business (excluding goods prohibited or restricted by the state). R&D, design, production and sales of various grinding machines, general cutting machine tools and CNC cutting machine tools, civil aircraft and equipment, lift manufacturing, marine supporting equipment parts, building materials (excluding hazardous chemicals), pipes (pipe piles), road manhole covers, road guardrail facilities, Wujinjiaodian (except fire-fighting equipment); agriculture, forestry, animal husbandry and fishery machinery manufacturing, automobiles, motorcycle parts Manufacturing and wholesale, recycling and wholesale of renewable resources; metal materials, steel castings, precision casting, forging; other special equipment, intelligent robots, parts and components production line manufacturing; waste machinery and equipment management, remanufacturing, machinery manufacturing for construction engineering, metal tool manufacturing for agriculture and gardening, technology promotion services; computer and general equipment rental, Internet and other Internet services.