There is monkey feng shui behind the head.

For, heaven also; Yu, tunnel also. "Heaven is the earth, the earth is the earth, and integrity is the study of heaven and earth. It is based on Hutuluo Book, combined with the eight diagrams of nine planets and the five elements of Yin and Yang, and integrates the movement of heaven, the transformation of the earth and human beings into it, forming a special theoretical system, thus inferring or changing the good and bad fortune of human beings and living forever.