In the second case, it will not harm the family and future generations, but will only make the dead restless, and the body will be immortal for thousands of years and become a zombie, with endless disasters. Of course, this is not a good anti-corrosion technology, but it is related to the location and environment of the ancient tomb.
In Feng Shui, the two most important points are "shape" and "potential". "Shape" refers to the landform where the tomb is located, and "potential" refers to the state presented by this landform.