Mr. De and Mr. Sai "Mr. De refers to democracy, Mr. Sai refers to science, and democracy refers to democratic thoughts 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.

The exposition of the basic contents of the new culture movement-four propositions and four oppositions-truly reflects the "newness" of the new culture movement. Namely: first, advocate democracy and oppose dictatorship.

Second, advocate science and oppose superstition and blind obedience.

Third, advocate new morality and oppose old morality.

Fourth, advocate new literature and oppose old literature.