Copper element symbol Cu, atomic weight 63.55, specific gravity 8.96, melting point 1083.4±0.20ºC, boiling point 25670ºC, copper is light rose or light red, copper oxide film formed on the surface, the appearance of copper, is one of the earliest human discovery of the ancient metal.

Cathode copper refers to copper concentrate produced by electrolytic refining or electrolytic deposition method of high purity copper, also known as refinedcopper or refinedcopper (refinedcopper), GB/T 467-2010, European standard BS EN 1978:1998 and ASTM B115 are industry standard specifications for cathode copper.
Rod, copper strip, copper foil, copper tube and all kinds of alloy products are widely used in electric power, electronics, transportation equipment, machinery manufacturing, construction industry, national defense industry, medicine, organic chemistry and other industries, in China's non-ferrous metal material consumption second only to aluminum.