The chinese pipeline science and technology equipment (hebei) ltd., with its registered address in the southern development zone of the hui autonomous district of mau village, wuzhou, hebei province, is the market supervision authority of mon village hui autonomous district, and its legal representative is zhang zhang zhang zhang, which operates in the area of architectural decorations and parts of the hydro-heating pipeline. Processing, marketing: pipes, plumbing equipment and accessories; welding, assembly, installation, sale: steel pipes, steel support, steel fences, steel structures, steel cylinders, steel cylinders; piping and plumbing preservative temperature; sales: green building materials, hardware exchange, metal materials; rental services for steel support, steel fences. (a project subject to legal authorization may only be operated with the approval of the relevant department; a general project may be operated on its own by law)