In its long historical evolution, Feng Shui has produced many schools, at least Zhou Li's account has clearly reflected the clues of this differentiation. There are two things about building site selection and construction. One is that "local official Situ" is in the charge of officials, while "Xia Guan Sima" is both, which mainly investigates and evaluates all aspects of physical geography, and then carries out site selection planning, involving "the law of local society", "the law of local suitability", "the law of local culture" and "the law of indigenous culture". The other system was run by "Guan Chun Zongbo", who was in charge of the ceremony of "establishing the country by ghosts and gods". It mainly uses astrology, divination and martial arts to determine the architectural orientation and time of cities, palaces, tombs and ancestral temples. These two things spread to later generations, forming two schools of Feng Shui. For example, look at Han Shu written by Ban Gu. In the Han dynasty, there was a distinction between the so-called "legalist school" and "integrity". After spreading to the Tang and Song Dynasties, it evolved into two schools: the "situation school" and the "rational style". For example, Ding Ruipu's "Feng Shui Solution" in the Qing Dynasty said: "The art of Feng Shui can't tell the position of the situation. Those who talk about the situation are now called mountains, and I say my position, and now I call it reason. " During the Tang and Song Dynasties, people had their own sects to teach and accept, and they stood on their own feet, but their views were different. "Wang Wei's explanation of" Qingyan Lu Conglu "is even more clear, and there is a cloud:" There are two kinds of people who speak geography in later generations. The method of ancestral temple began in central Fujian, with a distant source, and the imperial power in Song Dynasty was a big system. It is said that it is mainly astrology, with Yangshan in the direction of the sun and Yinshan in the direction of Yinshan. There is nothing wrong with it. It is purely based on the five-star (press, that is, five elements) gossip to determine the principle of birth and death. He learned it from Fujian, Zhejiang, and now he uses it very little. One said that the law of Jiangxi originated from Jiangxi people and Zeng; People like Lai Dayou and Zhiyi are particularly good at their studies. It depends on the situation, that is, what to play, that is, what to stop at, focusing on the collocation of dragons, caves, sand and water, regardless of other taboos. His knowledge is very popular today, and he follows it all over the country. "