WeiSiDun Group. Headquartered in ZhengZhou.Group consists of six companies, in addition to HeNan WeiSiDun Import and Export Trading Co., Ltd. which is specialized in the import and export of foreign trade, the other five companies all producing factories, mainly located in Tianjin, Hebei, Liaoning and Zhejiang. The major products for a variety of valves of cast iron, steel, stainless steel, copper materials; malleable iron and stainless steel pipe fittings; ductile iron, stainless steel fittings; flanges and other products, mainly used in construction, petroleum, chemical, power, water supply and drainage, municipal, medical people's livelihood and other industries.