Who is the calligrapher who is also called the "two kings" with his father Wang Xizhi?

(344-386), alias official slave, Han nationality, ancestral home of Lang _ Linyi (now lanshan district, Linyi, Shandong), was born in Huiji, Yinshan (now Shaoxing, Zhejiang). A famous calligrapher, poet and painter in the Eastern Jin Dynasty, the seventh son of Wang Xizhi, a "book saint", and the husband of Sima Yu in Jian Wendi.