What is the thought of "two noes" in Du Mu's literature?

Du Mu is famous for his poetry, prose and calligraphy. In Du Mu's theory of ancient prose creation, the ideology is put in the first place, that is, "meaning", and the momentum of the works is put in the second place, that is, the works are usually said to be smooth and often feel condescending. Some people say that this situation is good, while others disagree. The third place is phrasing, which is obviously a detail. Add a chapter at the end of the article to make it have rules to follow. In ancient times, the style of writing mainly refers to how to write, which is a question of writing skills and layout. In ancient times, it was separate. According to Liu Xie, "As the saying goes today, writing has a pen, thinking that those who have no rhyme write and those who have rhyme write", and writing and using a pen are separated. Writing is equivalent to poetry that is often said now. When talking about his two sons, Yan Yanzhi also talked about the problem of one learning to write and the other learning to write, which also refers to the difference between rhyming and non-rhyming. According to Du Mu's opinion, momentum is "full of momentum" in poetry creation, as well as in prose creation. There are poetic prose or prose poems now, just because the articles have come out, which is not good for some people.