a) The history of using copper is of more than 2,500 years. For generations, copper is regarded as the symbol of wealth. It is famous for its excellent plasticity, ductility and conductibility, and it can also resist erosion and germ. Due to its special nature, copper is widely used by more and more architects and developers as roofage as well as materials for outside-walls. b) Copper roofing tile is a new product for roofage which is processed by advanced patented techniques. It is widely used as roofage as well as materials for outside-walls.