Ten minutes. Specific method: Take out the green beans that have been soaked in advance and put them into the pressure cooker. It’s best to soak the mung beans in advance. If you make mung bean soup for dinner, soak it after lunch; if you make it in the morning, soak it in a pressure cooker the day before going to bed. Put enough water in the pressure cooker as much as you want to drink. Add white sugar or rock sugar, it depends on your taste. Place the pressure cooker on the induction cooker and turn it to high temperature. Then wait. Wait until the pressure cooker valve bulges and reduce the maximum temperature by half for twenty minutes. After 20 minutes, the induction cooker will automatically turn off, but do not rush to remove it. Wait ten more minutes and let the mung bean soup simmer for another ten minutes. That adds up to half an hour. Don’t worry after half an hour. After half an hour, you can put it in the pot and cook it, and you will have delicious mung bean soup! Pay attention to two points: first, do not exceed half of the capacity; second, after the high fire boils, it will immediately change to a low fire. As long as there is a sting at the safety valve, it's OK. Generally, it will be rotten ten minutes after turning off the heat and fifteen minutes after cooking. Also, opening the lid is the same as cooking anything else. After cooling, the pot can only be opened when there is no pressure inside it. If there is pressure, do not use the safety valve to forcefully release the pressure. Otherwise, the mung bean soup will spray out from the pressure valve under pressure and burn people. As long as you pay attention to the above points, you won't have any problems. Every time you open the lid after cooking, you will find that the water in the pot is as high as the mung bean soup and cannot be turned over. The back of the lid is clean, as is the pressure cooker used to cook mung bean porridge. As long as you pay attention to the above points, you can enjoy delicious mung bean soup and mung bean porridge at any time!