The five elements of Feng Shui are dragon, cave, sand, water and direction, and they are also five important factors that constitute the treasure house of Feng Shui. Its essence is qi. The purpose of searching for dragons, find holes, sand, water and directions is to find healthy qi suitable for human body and avoid evil spirits that are harmful to human body. The composition of a treasure-house of geomantic omen requires not only the "four elephants" (the so-called four elephants, namely "Suzaku, Xuanwu, Qinglong and White Tiger") to be complete in four spirits. ), but also pay attention to the context, Kaysa, Tang Ming, Shuikou, vertical direction and so on. That is, the dragon, cave, sand, water and direction that Feng Shui often says. "Ten Books of Yangzhai" said, "The folk houses should be dominated by mountains and rivers, and the mountains and rivers have the greatest momentum, and the people's wealth is the most important"; "The story of Yangzhai is the same, and it is also necessary to be lenient when you are alive. Tang Ming should accommodate 10,000 horses ... or from mountains or plains. There is water around, and there are roads around. " "More need to tidy up the nozzle, don't be too reluctant to enter a penny. The stars are close to the hall, and the record is not narrow. This statement is based on the big situation, and there is no strange grading. " This is a geomantic treasure-house model in terms of the big environment: that is, it requires endless mountains in the north; There are low mountains and hills in the south, echoing far and near; Surrounded by mountains on the left and right, it is heavily guarded; The middle part of the hall is unique and spacious, surrounded by curved water. This is an ideal place for geomantic omen. As Fo Yin said in "Feng Shui Lecture Notes": "The mountains are ups and downs, the heights are scattered, the music is lively, the center is out of the pulse, the acupoints are protruding, the dragon sand and tiger sand are surrounded by heavy, the mountains are outside the water, and the layers are guarded, which is as rich as the enemy."