At that time, "Kongjiadian" was synonymous with old culture and old ethics. Mainly refers to the abnormal development of "Confucianism" and imprisons ideas.
Since "Emperor Wu of the Han Dynasty" accepted the proposal of "Dong Zhongshu". Put forward "ousting a hundred schools of thought and respecting Confucianism alone". (It was a good policy at that time)
Confucianism has become the mainstream of feudal culture in China. As a result, all the students in our country are living a hard life under Confucianism. By the end of the Ming Dynasty, there appeared "cruel officials kill people by punishment, while Confucian scholars kill people by reason".
Chen Duxiu \ \ Li Dazhao wants to call Kongjiadian for the same reason as the May 4th Movement.
The May 4th New Culture Movement was the Enlightenment Movement in China.
Function: Get rid of old ideas and etiquette, and emancipate the mind.
For Confucius himself or Confucianism represented by Confucius, their criticism mainly points to using Confucian classics to restrain people's thoughts and personality.