Step China Yang group is a professional design, production and sales of the security steel enter-door, high-end custom door, fire door, steel door, wooden door series, intelligent lock series, stainless steel doors, large real estate development group co., LTD., the group covers an area of 600000 square meters, more than 5000 employees, has 11 international advanced modern industry production line, Buyang Door Industry Research Institute and the first 5G Buyang smart factory in China.