Why is it said that good Feng Shui should be surrounded by mountains and rivers?

The first principle of good Feng Shui is "surrounded by mountains and water." "That is to say: there is a mountain behind to support people, and there is water in front to prosper wealth.

The position of the backer is also called Xuanwu. If the position of the backer is not good, it will not be good for the wealthy, and it will lead to lawsuits and thieves. Xuanwu star is the god of darkness, and there are even more abnormal peach blossoms. In Feng Shui, the front is in charge of wealth, and the back is the mountain, which is in charge of people. Therefore, the backing of a house is important. It is very important to say.