孙中山是近代以来对西部开发问题作过最详尽、系统的阐发的第一人。民国建立以后，孙中山认为他政治革命的目标已经完成，当务之急在于发展经济，“民生”问题亟待解决。这一时期他致力于如何解决中国积贫积弱的问题，如何使’大多数人事大幸福”在1919年“一战”结束后，孙中? Sun Yat-sen was the first person to make the most detailed and systematic analysis of the issue of the western development in the modern history. After the founding of the Republic of China, Sun Yat-sen believed that the goal of his political revolution has been completed. The top priority is to develop the economy. The issue of “people’s livelihood” needs to be solved urgently. During this period, he devoted himself to how to solve the problem of poverty and weakness in China. How to make “most of the personnel happy” After the end of World War I in 1919,