Kuixing

The demon-faced like figure in the below picture is the God of Literature/Examiniation, Kui Xing.  He is usually depicted holding in one hand a brush and the other, a cake of ink.  He is widely worshipped by those who are seeking office or success in public examination.

In below figurine, he is depicted with one foot on the head of  a big turtle.  This is related to the auspicious message on imperial examination success: du zhan ao tou （独占螯头), literally  it can be translated as (du zhan) standing alone, (ao tou) on the head of the turtle. 

In ancient China, the top 3 candidates in the metroplitan examination are given an audience with the emperor.   During the audience, the top candidate would stand alone on one of the steps leading to the throne.  On that step is curved a turtle-like creature.  That is how the phrase "du zhan ao tou" originated.