Because, in the May 4th Movement, "democracy" and "science" held high were immortal and glorious flags, a patriotic spirit and a revolutionary spirit, which inspired generations of young people in China to pursue progress and light.

Democracy advocated during the May 4th Movement refers not only to democracy as a political system, but also to the idea and spirit of democracy, which is a spirit opposite to feudal ethics and autocracy.

As the banner of the May 4th New Culture, science not only advocates the concrete research of natural science, but also advocates scientific spirit or scientific thought. Democracy is the opposite of absolutism, and science is the opposite of obscurantism.

Zhang's democratic spirit of freedom, equality and individual liberation was closely combined with the scientific spirit of opposing ignorance, backwardness and blind obedience, which became a glorious banner against feudalism during the May 4th Movement.

The May 4th spirit with democracy and science as its core is a revolutionary spirit.