Guanyin soil, also known as kaolin, is a material for making porcelain. This kind of soil can satisfy hunger, but it cannot be digested and absorbed by human body. After eating it, it is difficult to defecate, and a small amount of it is not fatal. Although you won't be hungry, people will die because of lack of nutrition. Guanyin clay is rich in minerals such as silicon, zinc, magnesium, aluminum, etc. The chemical molecular abbreviation is Al4(Si4O1)OH6, and besides Al2O3, it also contains SiO2．. The salt is NaCl, which has no direct relationship.