The general business items are: Research and development, technical services, sales and leasing of multi-functional aircraft and aircraft model equipment; Provide photography and video services; Technology development in the field of aviation science and technology; Mobile application software, electronic products, automation products, communication equipment, instrument testing equipment, digital products, security products, remote control toys, simulation toys, photographic equipment, monitoring equipment, monitoring transmission equipment, computer software and hardware and auxiliary equipment, hardware and electrical equipment, electric tools, electrical equipment, chemical products (excluding dangerous chemicals, precursor chemicals, finished oil), labor protection products, fire equipment R & D and sales of household building materials, household appliances, wires and cables and accessories, electrical equipment, furniture, office supplies, cultural and educational supplies, plastic products; Domestic trade; Sales of class II medical devices; Import and export of goods and technology