What are the characteristics of Huang Tingjian's calligraphy?

Huangshan's ancient calligraphy is very distinctive, and its regular script creates a so-called radiator with a tight middle palace and four layers of long paintings, called "corpus luteum"; His cursive script created another peak after Zhang Xu and Huai Su. Judging from the effect, his cursive script gave full play to the lyrical role of stippling.