Progress after the October Revolution: 19 17. The victory of the Russian October socialist revolution is the new hope for China's advanced intellectuals to achieve national liberation. They gradually changed from radical democrats to intellectuals with progressive industrialism, and Li Dazhao was the first person in China to raise the banner of socialism.

Function: "democracy" refers to democratic thought and politics; "Science" mainly refers to the laws and spirit of modern natural science. The bourgeoisie preached democracy and opposed feudal autocracy, pointing the finger at Confucianism, the theoretical pillar of feudal autocracy; Advocate science and oppose feudal superstition and ignorance. This slogan reflects the requirements of China's social development and the urgent needs of the people, and has effectively promoted the development of the New Culture Movement. However, this slogan still belongs to the nature of bourgeois old democracy and has the limitations of its class and times. It can't be combined with mass movements, and it can't treat China culture and western culture from the viewpoint of historical materialism, so it can't fundamentally overthrow feudal thought.