The May 4th Movement was a great anti-imperialist and anti-feudal movement, a great ideological emancipation movement and a new cultural movement, which marked a new stage of China's democratic revolution. This movement held high the banner of patriotism, carried forward the spirit of democracy and science, promoted the spread of Marxism in China, and prepared conditions for the establishment of the Communist Party of China (CPC) ideologically and cadres. The May 4th Movement is an epoch-making event in the revolutionary history of China and a turning point from the old democratic revolution to the new democratic revolution in China.