... . Tianjin Shangyi Metal Structure Trade Co. Ltd is a leading export company base in Tianjin, which specialized in steel.Our capacity ... of supply is over 40,000 tonsannually. Our business turnover is over 30,000,000 USD dollars.We have market ... Plate, Mild Steel Plate, Structure Steel, difference kind of pipes, Galvanized Steel Pipe, Seamless Steel Pipe, Square/Rectangular Steel Tube, Light ...