Reason: During the period of Northern Warlords' rule, there was a counter-current of respecting Confucius and restoring ancient ways in the cultural field. The radical bourgeois democrats, represented by Chen Duxiu, put forward the slogan of "Down with Confucius", pointed the struggle at the traditional Confucian morality represented by Confucius, and publicized the new moral culture of the bourgeoisie, with the aim of shaking the ruling position of feudal thought, carrying forward democratic science and emancipating people's minds.