How about feng shui in a house with mountains? How to evaluate?

In feng shui, we pay attention to relying on mountains, "the mountains are expensive and the water is rich". There are pillars behind the house and a stable gas field, which can better hide the wind and accept the gas. But the mountain referred to by "backing the mountain" should be Jishan, which should be higher than this house but not too high, and the mountain should not be too close or too far. If the rocks are rugged and nothing grows, it is not Jishan. Similarly, the "mountain" in the city is the building, which is the Xuanwu position in the four elephants. Teacher Hou Zongyuan gave a detailed introduction to Feng Shui experts, but Baidu made reference to official website to learn about it.