Wang Xizhi lived in the Eastern Jin Dynasty and mainly used official script in the Han Dynasty. The famous You wrote a relatively standard regular script. In the Eastern Jin Dynasty, Wang Xizhi had a complete evolution and development of regular script techniques, and Wang Xizhi reached the peak not only in regular script, but also in running script and cursive script.
He can make such great achievements, thanks to his calligraphy evolution era and his diligent study, which opened the way for the development of calligraphy.