When building a house, they think that this place can hide the wind and gather gas, just like a cornucopia, which is relatively low in terrain and can gather water and make life more convenient.
Therefore, the "land where dragons gather" mentioned by Mr. Feng Shui in rural areas is the end of the mountain range, and it is also the mountain mouth of the old rural saying "build a house to find _ _, and bury the grave between the mountain mouths".