The ancients believed that the uplift of mountains and rivers was caused by the energy of Long Mai. Judging from all kinds of geomantic books, although Long Mai is intangible, all kinds of geomantic books have eyes and noses, some are scientific and some are nonsense.
There are many kinds in Long Mai. You should read the relevant ancient books. In different parts of Long Mai, there is a big difference between good luck and bad luck. In some places, good luck is conducive to building houses, and in some places, disasters are not conducive to building houses. This is a summary of China people's experience for thousands of years, but in ancient times there was no scientific theory to prove it, so we had to rely on legends and so on.
Xiaozhe