In October of the lunar calendar, put your finger into the grave to test the heat. If the soil is warm in 10, it means that the grave is full of air. It can't move ... 3. Dig with a shovel: Dig a shovel in the middle of the grave and see the color. If there is yellow Se for gold burial, if it turns white for silver burial, it means that the bottom is full of life, which proves that there are fresh seafood. There are fish, grasshoppers, lotus flowers, turtles and snakes at or around the bottom of the coffin. )