Why do bodies change when they are buried in places with bad feng shui?

In feng shui, it should be called shadow corpse (translated directly from Minnan), which means that after death, the corpse does not rot, and after many years, it is still intact, and some hair and nails continue to grow. This is extremely unfavorable to future generations. There are two kinds of shadow corpse: dry shadow and wet shadow. Generally speaking, the dry shadow is the tomb at the top of the mountain, and the wet shadow is in the valley between the two mountains. Experienced people can tell at a glance whether the buried body is corrupt or not.