Xu changkai american science and technology ltd. Has a registered address on wei wu boulevard and min yee street, in the city of xuchang, henan province. 27-d-1 level of german industrial estates, with the registration authority being the xuchang city market supervisory authority's model division for urban-rural integration, with legal personality representatives, operating on general projects: technical services, technology development, technical advice, technology exchange, technology transfer, technology diffusion; geological survey technical services; sale of specialized chemical products (without dangerous chemicals); sale of daily chemical products; sale of chemical products (other than licensed chemical products); development and development of new energy technologies; import and export of goods; import and export of technology; import and export agents; general cargo storage services (projects requiring licensing, such as hazardous chemicals); rental services (other than licensing services); sale of household appliances; installation services (in addition to legally approved projects, operating on an autonomous basis with a licence)