1, from the point of view of modern medicine, after death, the bacteria parasitic on the human body lose their host, leaving the dead host and covering their faces, which can prevent the bacteria from flying out of the stomach. "

2. After death, cover your face with paper, because the paper is very light. If the person is not dead, but not breathing for a while, then the breathing gas will shake the paper and avoid the result that the person is buried before he dies.

3. China people have the habit of staying for three days after death, and their faces will definitely not look good after death, so as to avoid people's fear of coming to mourn.

4. Cover the dust to prevent the dust from falling on the face of the deceased and give the deceased a clean, which is also a kind of respect for the deceased.