wáng xī zhī
Wang Xizhi (303-361), famous calligrapher of Eastern Jin, known as the sage of calligraphy 書聖|书圣
王
wáng
king or monarch
羲
xī
same as Fuxi 伏羲[Fu2 xi1], a mythical emperor
之
zhī
(possessive particle, literary equivalent of 的[de5])