The hanging coffin was not put in, but buried in it. Wherever there is a hanging coffin, water flows through it. In fact, a long time ago, the place where the mysterious hanging coffin was placed had a very high water flow. People could carry the coffin up the soil layer. But later, due to the movement of the earth's crust, the soil layer dropped in some places. After thousands of years of Feng Shui baptism, the coffin was slowly exposed, forming what we see now. Hanging coffin.