This also belongs to the Jedi. Of course, some people think it makes sense. Because of the low terrain, it belongs to a "pit", which is easy to accumulate rainwater, resulting in damage to the coffin tomb. This is the destruction of feng shui. The ancients believed that once Feng Shui was destroyed, it should be repaired in time and measures should be taken.
Burying graves in earthen pits, honoring parents, and lacking people in rural areas have many "rules" in funeral customs, especially the location of graves! In rural areas, there is a saying that "the grave is buried in the pit, filial piety is respected and the people are lacking", which means that there is a saying that "there is light before, and there is reliance after", which indicates the prosperity of future generations. What's wrong with burying a grave in a pit is that the terrain is low and easy to be flooded, which is not good for ancestors and affects future generations!