There are three needles and three boards in feng shui, so what is three needles and three boards?

The needle in the compass, the needle in the sky plate and the needle in the human plate are the "three needles and three plates" in Feng Shui. Field alignment needle, 24 mountain direction, used to identify the direction and locate the vertical direction. These twenty-four mountains are represented by twelve earthly branches plus eight dry dimensions respectively. Twelve earthly branches are Zi, Ugly, Yin, Mao, Chen, Ji, Wu, Wei, Shen, You, Xu and Hai, eight thousand are A, B, C, D, G, Xin, Ren and Gui, and four dimensions are Gan, Kun, Gen and Xun. Add them up. On the other hand, gossip the day after tomorrow, one divination governs three mountains, each accounting for fifteen degrees. The stitching on the ceiling is also in the direction of twenty-four mountains, but the scale is seven and a half degrees worse than the scene, which is exactly half a grid. The needle in the plate is still in the direction of twenty-four mountains, but the scale is fifteen degrees worse than that of the site needle, just one grid. Although the three needles and three plates are all in the direction of twenty-four mountains, their usage is different.

The station pointer is based on geomagnetism and points in the direction of geomagnetism, that is, it points to Twenty-four Mountains. In geomantic omen, it is used to correct the orientation, vertical direction and grid, that is, to determine the mountain range of the haunted house and the sitting direction of the building. According to the theory of geomantic omen, the right needle determines the north and south, which is the spirit of accepting the land, so it is called the right needle. At present, it is impossible to verify the establishment time of acupuncture in this part, but it has been used since the Tang Dynasty at the latest.

The stitching on the ceiling is also in the direction of twenty-four mountains, but the scale is seven and a half degrees worse than the scene, which is exactly half a grid. Pan Tian is used to receive water in geomantic omen, that is, to judge the water flow around the building. According to geomantic omen, sewing needle on the ceiling is the light of the sky, which is determined by measuring the sun shadow at noon. According to Liu's statement in the book "Avoid Mistaken Faxes" in the late Qing Dynasty, the sewing on the Twenty-four Mountains was created in the Tang Dynasty to measure the zodiac, so it is also called sewing.

The needle in the plate is still in the direction of twenty-four mountains, but the scale is fifteen degrees worse than that of the site needle, just one grid. In feng shui, people's plates are used to remove sand. The reason why it is called "human plate" is the meaning of heaven, earth and people. According to Liu's statement in the book "Free from Mistaken Faxes" in the late Qing Dynasty, Lai Wenjun created the Twenty-four Mountains of Needle for measuring stars, so it depends on the statement that needle in needle.