Foreign markets were very active in recent years, fierce competition. East and Southeast Asia the rapid growth of import and export of valves, North America and other developed countries of the European Community market between the sustainable development of trade, Germany, Italy, Japan, China and other countries and regions to expand the exports, the United States, Britain, France and other countries imported high-speed growth, the formation of the international valve market, the strong point of prosperity, In addition, as a result of further internationalization of the world economy, multinational companies will continue to promote the international valve market development, international trade areas is another major characteristic of Bi.