1, 5 minutes is a bit short. Soybeans with skin should be cooked in cold water in a pot for about 10 minutes after the water comes to a boil. If you like them hard, cook them for 8 minutes just enough that they won't be very rotten. If you like them softer, you can cook them for another 2 minutes.

2. Note: If you cook for too long, the pods will become soft and yellow, and the beans may fall apart, which not only affects the appearance, but also reduces the taste.

3, hairy beans must be thoroughly cooked, pinch raw hairy beans will be poisoned. Uncooked beans contain substances such as hemagglutinin and antitrypsin. Hemagglutinin is absorbed by the body, can make the blood of red blood cells condensation, cause discomfort symptoms. Antitrypsin inhibits the activity of protease in the stomach, which not only causes indigestion but also enlarges the pancreas. This substance can affect human health when it enters the body, and can even cause a toxic reaction, leading to nausea, vomiting, abdominal pain, diarrhea, dizziness, headache, numbness and other symptoms. However, as long as the hairy beans are cooked and consumed, these toxic substances will be inactive.