Manufacturing, processing, and sales of generators, generator sets, water pump units, agricultural machinery, construction machinery, textile machinery, mechanical equipment, water pumps and accessories; R&D, manufacturing, processing, and sales of tractors, diesel engines, gasoline engines, and engines; sales of automobiles (except cars), motorcycles, hardware tools, and their spare parts; self-operated and agent import and export business of various commodities and technologies, except for commodities and technologies that are operated by national companies or are prohibited from import and export.