Of the 24 mountains on the compass, the earthly branch accounts for half, the eight four-dimensional branches account for half, the eight four-dimensional branches and the twelve mountains represent the qi of heaven, and the earthly branch and the twelve mountains represent the qi of the earth. When the building complex sits in the middle of the four-dimensional eight trunk lines, it is ten to zero for the gas of heaven and earth, which is called zero. The vertical line is between two mountains, that is, fifty cents to fifty cents. When the vertical line is pressed between the twelve branches, it is ten to zero. The order is zero, nine, two, three, four and five. Judging from the proportion of Yin and Yang between heaven and earth, the acquired Yin and Yang are in a relatively balanced state, which is often called "Du Ji Endeavour". However, because the pattern of geomantic omen is very different, geomantic omen all stand in the same direction, and the basic principle is the combination of dragon and water, so in the view of experienced geologists, there is a 360-degree compass.