Due to different national political systems， different levels of development of productive forces of integration and cooperation， leading to the development of some developed countries to reduce investment in C Such as the North American Free Trade Area， the Great United States， Canada co-operation not only developed but also with the development of the Mexican L Mexico is a production structure in China is similar to developing If the United States investment in developing countries， it will first select a favorable and mutually beneficial terms with their member countries – Mexico， while China was not In addition， the 90’s， the North American Free Trade Area of the two regional groups and the EC will focus on development within their respective regional groups， or in order to compete， the funds to invest in the United States， Western Europe， Japan， the developed
