(1) Conditions of the new era: It happened in the new era of the world proletarian socialist revolution initiated by the October Revolution in Russia. (2) The growth of new social forces: With the development of national capitalism during the First World War, China's working class and national bourgeoisie further grew. The working class in China has become an increasingly important social force.

(3) Driven by the wave of ideological emancipation set off by the New Culture Movement, it has prepared a preliminary mass base and backbone for the May 4th Movement.