Other known as god of literature
Paintings of Kui Xing are hung at home for symbolizing coming in first place in studying and testing. Many chinese traditional homes have Kui Xing paintings in children's study rooms.
His form developed, people depicted Kui Xing's right foot standing on a character 鰲 (ao), a giant turtle, in reference to a traditional saying, 獨佔鰲頭, "to stand lonely on the ao's head", meaning coming in first in examinations, his left foot support a ladle, a writing brush in his hand, and his body full of vigor and life
Not the original painting.
By Grandmaster Tu Jin Sheng