YIFA Group. Headquartered in Luoyang, which is the geographical center of China, Central Plains hinterland,China's major railways, aviation, highways, electricity, post and telecommunications hub cities, International Air Logistics Center, also an international land port city!Group consists of six companies, in addition to Luoyang Yifa mechinery techonology co.,ltd . which is specialized in the import and export of foreign trade, the other five companies all producing factories, Two Butterfly Valves factory located in Shanghai city and Tianjin city...