Which dynasty was Wang Xizhi from?

A calligrapher of the Eastern Jin Dynasty, whose name is Yi Shao, whose name is Lian Zhai, Han nationality, whose ancestral home is Langya, moved to Huiji (Shaoxing) and wrote the Preface of Lanting Collection. In his later years, he lived in seclusion in Huiji, which governed Jinting County, and was known as a calligrapher of the Eastern Jin Dynasty in China. He has been a secretary, a general of Ningyuan, and a secretariat of Jiangzhou. Later, he was the civil history of Huiji, and led the right general, who was called "Wang Youjun" and "Wang Huiji". His son, Wang Xianzhi, is also good at calligraphy, and the world is collectively known as the "two kings". . Since then, the calligraphy talents of the Wang family have come forth in large numbers. He died in the Eastern Jin Dynasty for five years and was buried in Jinting Waterfall Mountain (also known as Ziteng Mountain). The fifth Sun Heng's house was Jintingguan, and the site still exists.

Baidu encyclopedia entry, more detailed.