Feng shui, what buried zombies?

It depends. If the body doesn't rot, it is isolated from the air except medicine. There are many reasons for human decay, but the intervention of air will breed bacteria. . . . The coffin wood is definitely not good. If it is all steel, because there are loose holes on the surface of the wood that can't be seen by the naked eye, air will intervene. Therefore, if it is a metal coffin, the air tightness can reach the bolt. As long as the air is not involved, no matter how many bacteria grow in the body of the dead, people will not rot. Because bacteria will die without air.