Shanghai blue and wires ltd. Operates in the field of electrical equipment, metal materials and products, electrical cables, electrical kits, instrumentation instruments, electromechanical equipment and accessories, sale of electronic products, electrical tropics, telephone hotlines, electrothermal alloy, thermometers, instrumentation instruments, electrons, precious metals, cable production, technical development, technical advice, technical services in the field of mechanical equipment, industrial automation equipment, import and export of goods and technology。