The registration address of the permanent city of changzhou is located in room 309, building 118, building 1, zhang jiamura, silin street, in the bell-building district. The registration authority is the city of changzhou district administration office for political services, represented by legal persons, and includes the wholesale distribution of hazardous chemicals (operating within the scope of the dangerous chemicals operating licence); the sale of hazardous chemicals; the installation of composite materials, photovoltaic materials, electrons, medical intermediates, pesticide intermediates, plant extracts, food additives (involving the operation of licensed projects), chemical raw materials and products (dehazards), needle textiles, clothing, footwear, building materials, chemical equipment, decoration materials, metal materials, general machinery and accessories, hardware products, labour insurance items, solar equipment and accessories; the installation of solar energy equipment; import and export operations of self-employed and agency goods and technologies (with the exception of goods and technologies for which the state limits the operation of enterprises or prohibits import and export); and non-vocational skills training (without the national uniform vocational certificate type of training). General projects (for which authorization is required by law and approval of the relevant department is required to carry out business activities): daily sale of masks (non-medical); wholesale distribution of medical masks; retail sale of medical masks; sale of type ii medical devices; sale of gas compressors; sale of new membrane materials (in addition to legally approved projects, operating autonomously under a licence)