It requires literature to fully express the author's personality and opposes all kinds of rules and regulations set by the retro school in literary expression methods. They believe that "what comes from the soul is true poetry", and good poems and articles are "willful" and "flow out from the chest one by one".

They advocate writing in an approachable literary language, without any allusions, and adopt a large number of proverbs, "Better be a modern man than a layman, and refuse to pick up words". In this respect, they think they have accepted the traditions of Yuan Zhen and Bai Juyi. Their efforts made great contributions to the liberation of the style of writing at that time, and the poems of the public security school were once popular and became the objects of imitation and learning.

The representative figure of the public security school in Ming Dynasty

"Police Sanyuan" is the leader of the police school, among which Yuan Hongdao has the highest reputation and the greatest achievements, followed by Yuan Zhongdao and Yuan Zongdao. Because he is a Hubei public security person, he is called the "Public Security School". Yuan Hongdao is the most famous, and he put forward the core slogan of public security schools.

They are all famous writers in Ming Dynasty. After the ancient prose movement in Tang and Song Dynasties, they set up a banner of the literary innovation movement. Their achievements are not only literary achievements, but also ideological achievements, which have had a positive impact on the history of the next few hundred years and even the May Fourth Cultural Movement.