How deep should the burial grave be?

The depth and width of tombs are very particular. In the feudal era, there were very strict regulations on the depth of tombs. Ordinary people in modern society say from Feng Shui: if you have no children, you will be three feet nine, if you have one child, you will be four feet two, and if you have many children, you will be four feet seven. In theory, the nobler the person, the more heirs they will have and the deeper the tomb, so the imperial tomb is buried very deep. But six feet is the limit for ordinary people.