Sioux county's hanzei new materials technology ltd. Is registered at the sioux state industrial park and north-west corner of plant no. 33 on the second floor of road no. 2, with the registration authority being the administrative authority of the sioux county industrial park, with representatives of legal persons operating in areas including licensed projects: construction works; construction professional operations; interior decorating (subject to legal authorization for projects, subject to approval by the relevant department) general projects: technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; development of new materials; marketing of new film materials; safety technology system design services; engineering management services; construction of green gardening works; professional cleaning, decontamination services; services; services services (without labour); internal air pollution management; sale of food products (for prepackaging food only); sale of second type medical devices; sale of optical equipment; production of electrical equipment; sale of goods and services; sale of goods and services for sale of chemical products (for sale); sale of goods and services (for sale of electrical products); sale of goods and services (for sale of goods and services); sale of goods and services by day (for sale of goods); sale of