1919年的五四运动，对中国的政局变化起到了重要的作用，在这场运动中，中国的工人阶级以独立的姿态登上了政治舞台，五四运动取得了重大的胜利。这场运动在当时的社会上引起了巨大的轰动，社会上反映十分强烈。我们可以发现，在这一时期，作为中国近代伟大的革命家孙中山先生? The May Fourth Movement in 1919 played an important role in the political changes in China. In this movement, the working class of China mounted its independence on the political stage and the May Fourth Movement has won a major victory. The movement caused a huge stir in society at that time, and the social reaction was very strong. We can find out, during this period, Sun Yat-sen, a great revolutionary in modern China,