西 部地区经济基础较弱 ,其大开发需要有外部经济的参与和支持 ;东部发达地区经过２０年的经济高速增长 ,也需要到西部拓展更大的发展空间。东部地区是西部大开发的主要推动力量之一。东、西部经济合作 ,是东部发达地区参与和支持西部大开发的主要方式 ,也是西部大开发寻求东部 The economic foundation of the western region is weak, and its grand development requires the participation and support of the external economy. After 20 years of rapid economic growth in the developed eastern regions, it is also necessary to expand the space for development in the western region. The eastern region is one of the major driving forces for the development of the western region. The economic cooperation between the east and the west is the main way for the developed eastern regions to participate in and support the large-scale development of the western region and the eastward development of the western region