"Truth" is the characteristic of Yang Wanli's poetry creation in the Southern Song Dynasty. The most prominent feature of "Chengzhai style" is that it is good at keenly discovering and quickly grasping all natural things and interesting aesthetic scenes that are difficult for ordinary people to find or easily ignore in daily life. Another feature is to pay attention to the integration of one's own subjective knowledge and experience in the description of scenery, so that it has a unique sense of interest.