Why can the national wind go out of the circle?

Guofeng is a collection of ancient poems which originated from the Qin Dynasty. At that time, there were three common formats of ancient poetry: four books, five classics, seven music and ten songs. The national style formed a circle around it that could avoid censorship, so that the authors of ancient poetry could express their views with confidence and were not bound by censorship. Therefore, the reason why the national wind can get out of the circle is because it provides an isolated space for people to travel through time and space, and a space for free expression of ideas.