上海是中国工人阶级的摇篮,是中国工人运动的重要发源地。在20世纪20年代,上海的工人数量已超过50万人,占全国200万产业工人的1/4。早在中国共产党成立前,马克思主义已经在上海工人阶级中传播。1919年五四运动爆发,接受先进思潮洗礼的上海机器业工人就已经出现在上海的游行队伍中。 Shanghai is the cradle of the working class in China and is an important birthplace of the Chinese workers’ movement. In the 1920s, the number of workers in Shanghai exceeded 500,000, accounting for one fourth of the country’s 2 million industrial workers. As early as before the founding of the Chinese Communist Party, Marxism had spread in Shanghai’s working class. In 1919, when the May Fourth Movement broke out and the Shanghai-based mechanical workers who received advanced ideological baptism had appeared in Shanghai’s parade.