Mr. De opposes autocracy, while Mr. Sai opposes ignorance and superstition.

"Mr. De and Mr. Sai" is an important slogan put forward during the New Culture Movement. During the May 4th Movement (19 19), the hot-blooded young people held high the two banners of "democracy" and "science" and violently fired at feudal ethics and feudal autocracy, thus moving towards the road of combining workers and peasants. There are also sculptures of Mr. De and Mr. Sai on the campus of Peking University. It was the product of the historical background at that time.

Extended data

Meaning:

The slogan of "Mr. De and Mr. Sai", that is, "democracy and science", is the theoretical pillar of Confucianism that advocates democracy, opposes feudal autocracy and points the finger at 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 establishment of the two banners of democracy and science in the New Culture Movement has brought about earth-shaking changes in many aspects of China, and created great opportunities for the wide spread of new ideas and theories. The textbook's exposition of the basic contents of the new culture movement-four propositions and four oppositions-truly reflects the "newness" of the new culture movement.

Baidu encyclopedia-Mr. Desai