Steel is easy to process in factories and the quality can be strictly controlled. Light steel has such characteristics and superiorities: stable quality, high strength, good shock and corrosion resistance, light in weight, which can cut the cost of foundation construction, easy for construction to lower down cost, termite prevention, not inflammable, durable structure, green and environment-friendly building materials with100% recycling rate, waste-free. Steel structure is superior to ordinary structures(steel concrete or brick concrete)