Feng Shui is a method with a long history and great influence in China. Although it has a strong mysticism and contains a lot of witchcraft superstitions, it is not without its merits. Just as ancient witch doctors gave birth to medicine, alchemy gave birth to chemistry and invented explosives, geomantic omen has great positive significance to the development of ancient architectural science in China, the accumulation of ancient geography and hydrology knowledge, and the invention and dissemination of compass. One of the four great inventions of ancient china, the prototype of the compass, originated from the compass in the hands of Feng Shui experts. The four forms of compass, from Sina in Han Dynasty to meridian needle in Tang Dynasty, and then to Meng Xi Bigu in Song Dynasty, are all related to geomantic experts. Compass The inner disk of the compass is locked by the earth's magnetic field, and the outer disk is determined by the direction of the sun. The deviation between them is 7.5 degrees. Geomantic omen has also made great contributions to the invention of artificial magnetization technology and the discovery of magnetic declination.
In a word, while criticizing the witchcraft superstition in Feng Shui, we should also see some scientific contents contained in it and correctly evaluate its value and position in the history of China's scientific and technological development.