Who is "Wang Youjun"?

Wang Xizhi (303-36 1, 32 1-379), a calligrapher in the Eastern Jin Dynasty, was born in Linyi (now Shandong), Han nationality, and later moved to Huiji (now Shaoxing, Zhejiang). In his later years, he lived in seclusion in Shanxian County. Later, he was the secretariat of Huiji, who led the right general and was called "Wang Youjun" and "Wang Huiji".