What are Yang Wanli’s poems called?

Yang Wanli's poems are called "Chengzhai Style".

Explanation of "Chengzhai style":

(1) Yang Wanli, named Chengzhai, and the poems he created are called "Chengzhai style".

(2) "Chengzhai Style" composes poems using the natural line drawing technique. It has the characteristics of novel and interesting imagination, popular and lively language, and flexible style.

(3) Quatrains are the most outstanding in "Chengzhai Style".