This happened in Xingnong Town, Jidong County, Jixi City, Heilongjiang Province. On the day of a family dinner, they all ate homemade food? Sour soup? Caused food poisoning, resulting in the tragedy of 7 deaths among 9 relatives. This? Sour soup? It is a coarse noodle fermented by corn mill, which is a traditional specialty food in Northeast China. It is made of coarse grains, rich in nutrition, smooth in taste, appetizing and invigorating the spleen. ? Sour soup? There is no toxin in itself. The reason why they are poisoned after eating is because they are self-made? Sour soup? It has been frozen in the refrigerator for a year. After hospital testing, the food has become moldy and contains a lot of aflatoxin, which leads to poisoning of the whole family. Aflatoxin is a toxin that can cause liver cancer or other cancers. One milligram can cause cancer. If a person eats 20 milligrams of Aflatoxin once, it can directly lead to death. Its toxicity is 68 times that of arsenic. It can breed in an environment with a temperature of 28-38 degrees Celsius, but it needs to be killed at a high temperature above 280 degrees Celsius. Usually, it is in some moldy foods, fungus, bitter nuts and deterioration. In daily life, many people often put some unfinished food into the refrigerator with the mentality of not wasting food. Perhaps the food has been mildewed before it is put into the refrigerator. The mildewed food is not necessarily toxin-free. Every food has its shelf life and storage method. Improper storage will also make the food expire or mildew. The mildewed food must be thrown away in time. Some ingredients should not be frozen in the refrigerator for a long time, so don't cause irreparable losses because of fear of waste. Usually, the chopsticks and chopping boards we use should be placed in a ventilated place to let them drain and keep dry. For the health of ourselves and our families, we must pay attention to food safety at ordinary times, and start from the details of daily life to avoid similar tragedies.