Author: Daoheng, King of the Qing Dynasty
The compass is generally composed of a land plate and a sky plate. The compass is divided into straight needle, sewing needle and middle needle; it is divided into gold plate and silver plate; it is divided into inner plate and outer plate; it is divided into three plates: heaven, earth and man. Some Feng Shui masters use straight stitches to measure the sky, some use straight stitches to measure the dragon; some use stitches to measure the earth, and some use stitches to determine the direction of sitting. There are no unified regulations, and Feng Shui masters all practice their own way, claiming to be authentic, and all claiming to have secretly received the true teachings of their ancestors.
The land is a square, or pallet, with two cross-shaped lines on it and a concave circle chiselled in the middle. The sky disk is circular with a slightly convex bottom and can be rotated when placed on the concave circle of the ground. There is a compass, also known as a magnetic needle or a golden needle, in the middle of the sky disk, which roughly points to the south.
The sky and the earth symbolize the round sky and the earth.
The compass on the sky disk. The Feng Shui master calls it the right needle. The direction pointed by the straight needle is actually not true south. In order to determine due south, a stitch was set up. A magnetic declination angle is formed between the sewing needle and the positive needle.
The key to using a compass is to read the needle. If you want to know the direction of a certain cave or house, place the compass on the stone tablet of the cave, or in the middle of the door of the house, or in the courtyard of the yard. Place a three-inch-thick rice on it, press the rice into a horizontal surface, and place the earth on top of the rice. . Remove the surrounding metal objects and then wash the sky disk with clean water. Throw the pointer two or three times to see if the needles are all pointing in the same direction, the meridian. Just like taking the pulse in traditional Chinese medicine, Mr. Feng Shui summarizes the shaking of the needle as the "eight wonders": when it is touched, it is fearful, floating and uncertain, and does not return to the center line. It shows that there are ancient artifacts underground. Erdui, sudden, horizontal needle, not returning to Ziwu, indicates that there is metal underground. The three deceptions are deceit; the needle is turning unstable. Four explorations, shooting and throwing, half sinking and half floating. If there are no five, it means there is bronze in the ground. Sixth, it is not smooth, the needle floats and moves randomly. The seven sides are not jade, they are tilted to the east or west. Bazheng, collect the center line. The first seven oddities are all unlucky. Only number eight is auspicious. If a Feng Shui master wants to check the direction of water, he can use the red line (some use white line) in the middle of the compass (tray) to designate the intersection of the water mouth, and then turn the circular compass so that the magnetic needle is parallel to the seabed line of Tianchi, and then look at the red line on the disk. Which word it refers to can be used to deduce the good or bad luck of the direction based on Feng Shui theory. If the direction is not suitable, I need to adjust the compass until it is auspicious. This method is used in gelongsha, acupuncture points, and building houses.