Shanghai occupies 113000m2 in area of which 26137m2 are for building areas. It has been the largest production base for steel castings and forged refining steel ingots in east China.

It's used in mining, steel production, oil refining and chemical synthesis, and in the manufacture of fertilisers, detergents and plastics.

To take away the refining part of the steel making cycle off an electric arc furnace, which is discussed elsewhere, is an excellent start.