The registration address of the dong chong city army billion science and technology ltd. Is located in building no. 10, building no. 1, located in the tung chong city, guangdong province. The registration authority is the market supervision authority of dong chong city. The legal entity is represented by the isis and operates in the areas of research and development, production, processing and sale of: precious metal materials, metal composites, high, medium and low-pressure electrical alloy alloy materials, silver contact points, electron devices, electrical accessories, spare parts, spare parts for hardware, spare parts for gold, fast-acting switches, crushing moulds, mechanical equipment, scientific information advice, technology brokering services, goods import, export and import of technology. (projects subject to legal approval are not allowed to operate without the approval of the relevant authorities) i'm not sure