Below the house is red sand. What is Feng Shui?

It doesn't matter if there is red sand under the house .. like the northeast is dominated by black soil, there are more red sand than Shanxi.

If people live, it can only show that there is more sand and less mud, the soil is loose and some soil layers are thin; The soil has poor absorbability, leakage of fertilizer and water, and low content of organic matter and various nutrients.

Not suitable for growing plants, not related to residential feng shui. But it has something to do with the grave.