1. "Essays on Canon" opposes the habit of "scholars despise each other" since ancient times, arguing that the length of works is due to different styles and different talents of writers. He advocates the attitude of "judging yourself and others" to treat literary criticism.
2. On the relationship between the article and the cause: Cao Pi thinks that the social status of the article is as important as the cause, so he raised the article to the height of the great cause of the country and the immortal event. For example, the article says that "building a great country is an immortal event."
3. Literary Qi is talent: From Cao Pi, "Qi" was introduced into literary theory. The article holds that "Qi is the mainstay of literature" and "Qi" refers to the reflection of a writer's talent in his works.
Fourth, the distinction between literary styles: that is, the distinction between literary themes. According to the characteristics and different requirements of the genre and nature of the text, the four subjects of the style are distinguished from each other. The four subjects are elegant, rational, practical and beautiful. The characteristics of "the beauty of poetry is endowed with beauty" indicate that Jian 'an literature gradually develops into gorgeous ci.
5. About the attitude of literary critics: This paper points out that the attitude of literary critics is wrong, criticizes the view of being noble and humble, respects the ancient and belittles the present, and further states it on the basis of predecessors.
Cao Pi's Dian Lun Wen is a new symbol of the times in the history of China's ancient literary criticism.