What does the yellow line in Feng Shui mean?

Eight evils, also known as eight roads, are also in the form of 24 squares, that is, each square of gossip is divided into three squares, of which 12 is marked with words. Of the 24 directions, four are Zi, Wu, Mao and You, and about four are heavenly stems. The four corners are the four hexagrams of Gan, Kun, Gen and Xun, which belong to the acquired eight diagrams; The earthly branches of the four hexagrams. The occupation of Huang Xie refers to the relationship between the four hexagrams and their adjacent two days. There is a certain technology: "Geng Dingkun is dying, B and C must prevent flooding, and A and B must stop seeing the middle root and let the new waterway be afraid to do it." Among them, Geng Ding and Kun are adjacent, and every two stems are related to the hexagrams they clip. The four corners are known as the Four Mausoleums in terms of art, and Yang said in "Qing Nang Ao Zhi": "Chen's ugliness is not inhabited by ghosts and monsters, so the ancients took the Four Mausoleums as golden dragons." The ghostly night happens to be at the four corners, so this floor is also called Bagan's Tomb. This is the expression of the special position of the four corners in the profession, which has the same meaning as the four doors of heaven, earth, man and ghost in the early ruins. The four corners need a certain orientation, and not all orientations can be matched with the four corners. It is a rule to kill people at Bagan Tomb. There are eight evils in the four corners, so it is called eight evils. There is yellow land underground in these eight directions, which is where the evil side lies, so it is called eight evil yellow land. This is an extension of the meaning of killing Bagan's tomb. Of course, this is a common name, but a common name is often a surgical name. The form of compass layer is to mark two inappropriate stems in a box corresponding to four hexagrams in four corners, such as Ding Geng in Ge Kun position, Ren Xin in trunk position, E-C in the box and Jia Guibiao in the box; Mark the names of inappropriate hexagrams in the boxes corresponding to the eight stems, such as Ding Geng Biao Kun, B C Biao Xun, A Gui Biao Gen and Biao Gan. This layer is 24 squares, which are used in coordination with 24 directions, and it is the part where the positive needle of the compass occupies 24 directions. Lei, a teacher from Liu Yuzhen, has a special application in the interpretation of scientific Feng Shui.