What are the characteristics of Xian Yushu's calligraphy?

Liu Yuanguan's "Liu Wenji" says: "Being trapped in school makes the river full of vitality, the wine is drunk, poems are written, and strange things are born." Zhao emphasized his cursive script, saying, "My servant and Bo's classmates all write cursive script, but Bo's cursive script is far more than. Servants and forces cannot keep up. " (Zhu's Coral Wood Difficult) Objectively speaking, compared with Zhao Caoshu, Xian Yushu is not good at harmony, but better than Yao Jiaoqi. Although it is magnificent and heroic, it is a pity to ask for nuance in stippling.