Northwest China is called "Tianmen" in geomantic terminology, which also means that the father and the people are in power. In the practical application of geomantic omen, this position is usually used as the master bedroom of the gods. Northwest Five Elements belong to the Golden Five Elements Institute, which is in charge of lung, throat, nose, tongue and large intestine. The northwest corner is dry metal, representing the elderly men in the family, and the body part is the lungs.