２１世纪各国都为新一轮的西部等落后地区开发制定了新的可持续发展战略，掀起了新一轮的开发热潮。 ２０世纪，世界各国为使其经济和社会发展步入良性循环，纷纷仿效美国等发达国家制定扶植政策，吸引国内外资金开发西部落后地区，它们的经验主要体现在一是灵活优惠的土地开发 All countries in the 21st century set a new strategy of sustainable development for the new round of development in the backward areas such as the western region, setting off a new round of development craze. In the 20th century, in order to put their economic and social development into a virtuous circle, all countries in the world followed the example of the United States and other developed countries in formulating supporting policies and attracting domestic and foreign funds to develop the backward western regions. Their experiences mainly reflected in the following: First, flexible and preferential land development