Zhayu
 by some Taoist ministers. Because it was created from this Yin energy, Zhayu is said to be a vicious and bloodthirsty creature. Zhayu also supposedly likes breakfast of human flesh, it's just that he eats for people who intend evil or infiltrate the palace. This happens because the seal in pairs by the Taoist priests for Zhayu not loose. Historically Zhayu himself was not only to guard the palace but also for the greedy king's freedom, to be converted. So obviously Zhayu not only menjada palace from an outsider but also to call the residents of the Palace in order not to do wrong.