It is said that the soil and water in the south nourish people. What is the basis for this?

Let’s give an example first. There is a record in the famous ancient scientific and technological document "Kaogong Ji": There is a plant called Orange south of the Huaihe River, which is sweet and refreshing, but when it is transplanted to the north of the Huaihe River, it turns into another plant called "Pruitrus aurantium". . Although the branches, leaves, and fruits look exactly the same as oranges, "the taste is completely different." The reason is that "the soil and water are different". This is true for plants, and so is human beings. The human body is nothing more than a complex of carbohydrates. He (she) must be affected by the material environment of the place where he (she) was born and raised. For example: soil quality, water quality, temperature, humidity, sunshine, wind, rain and snow, and even the animals and plants that grow on this land, etc. The fact that the human body is affected by the natural environment can be strongly confirmed by the fact that there are human races with various skin colors on the earth, because these human races with different skin colors are completely caused by the natural environment. It can be seen that the impact of the natural environment on the human body is fundamental, and it even affects and creates the genes of the human body (for example, black people in Africa, white people in Europe, and yellow people in Asia).

Similarly, water and soil also support buildings. For example: because there is drought and little rain in Xinjiang, its building roofs are not herringbone roofs but flat roofs; because Mongolians are nomadic people, the design of yurts is round, which can adapt to strong winds in any direction; because the southwest is humid and rainy , so there are mostly stilt-style buildings to prevent ground moisture and poisonous insects and snakes from invading; because the Hakka people live in Fujian, they are vulnerable to being squeezed out and attacked by locals or people of other races, so its earth buildings are all square or round. The defensive carved towers were built; because of the characteristics of the large northern families living together, extremely extensive courtyard houses were built. These are all manifestations of "the soil and water support the building." The main purpose of this Feng Shui culture is: adapt measures to local conditions.

Water and soil not only refer to the physical environment, such as temperature, altitude, latitude, humidity, etc., but also include the human environment, such as the difference between nomadic culture and farming culture mentioned above, as well as the degree of economic development, etc.

For example: People from the south of the Yangtze River have good skin due to the climate, and so do the people from the northeast who are tall.

However, there are historical and cultural reasons for the bold character of Northeastern people (generally speaking). In the current sense, most Northeasterners are the descendants of immigrants from Shandong. There are often many immigrants when they first arrive in a place. Conflicts between immigrants and indigenous people often cannot be resolved by reasoning. The scholarly land of Jiangnan has a long history, and many problems have ready-made solutions without resorting to force.