Generally speaking, it is best not to eat moldy things. Further, things that may have been moldy, even if there is no mold visible to the naked eye, have been entered by bacteria. Aspergillus toxin has been listed as a kind of carcinogen by the cancer agency of the World Health Organization (WHO), which has strong toxicity and carcinogenicity, and its toxicity is 68 times greater than arsenic, which seriously damages liver organs, easily pollutes food and harms human health. Aflatoxin mainly exists in moldy grains, corn and peanuts, and is easy to grow and reproduce in warm and humid environment, which is an important reason for the high incidence of cancer in parts of Asia and Africa.