Manufacturing of pumps and vacuum equipment; research and development of machinery and equipment; sales of pumps and vacuum equipment; manufacturing of motorcycle parts; research and development of motorcycle parts; engineering and technology research and experimental development; agricultural machinery manufacturing; sales of agricultural machinery; sales of machinery and equipment; manufacturing of professional machinery for agriculture, forestry, animal husbandry, sideline and fishery; sales of professional machinery for agriculture, forestry, animal husbandry, sideline and fishery; ship manufacturing; ship sales; manufacturing of marine supporting equipment; sales of gears and gear reducers and gearboxes; sales of gears and gear reducers and gearboxes Manufacturing; sales of water transportation equipment spare parts; manufacturing of security equipment; sales of security equipment; manufacturing of general equipment (excluding manufacturing of special equipment); manufacturing of tractors; sales of water transportation equipment; manufacturing of bearings, gears and transmission parts; sales of bearings, gears and transmission parts; manufacturing of non-metallic ships; manufacturing of recreational boats and sports boats; sales of recreational boats and sports boats; production of special labor protection products; sales of special labor protection products; manufacturing of hardware products; research and development of hardware products. Licensed items: technology import and export; goods import and export.