Aviation equipment research and development, manufacturing, sales, maintenance, leasing and related technical information consulting; aircraft decoration services; aircraft sales agency and after-sales technical services; aviation model and handicraft production and sales; automated assembly line operation equipment, logistics and warehousing equipment manufacturing and sales; sales of mechanical equipment and accessories, packaging materials; sales of aviation equipment; import and export of goods or technology (except for the import and export of goods and technology prohibited by the state or involving administrative approval).