What are the artistic features of Mi Fei's calligraphy?

Regarding his calligraphy, Song Gaozong and Zhao Gou thought: "Mi Fei's reputation as a capable calligrapher seems to be no less than that in the world ... and people who like to practice his calligraphy are just handsome in appearance, swaggering and magnificent, and have never learned the beauty of the Six Dynasties, so they are naturally detached. It used to be said that the Taoist priest in Zhidun loves horses without rhyme, and he supports Japan:' Poor people love their handsome ears.' So is Yu Yu. The beauty of Mi Fei's writing lies in "detachment" and "divinity", just as he said "true training and innocence".