That depends on what kind of electric pressure cooker you have. There are two kinds of electric pressure cookers on the market now, one can be opened after heat preservation, and the other cannot be opened directly. If your electric pressure cooker has intermittent exhaust after cooking, the word "F" will be displayed on the screen. When "F" changes to "B", your electric pressure cooker can be turned on, but if your electric pressure cooker is cooked, an electric pressure cooker that directly enters the heat preservation state without any exhaust process can't be directly turned on, especially for food with soup. The way to quickly open this electric pressure cooker is to unplug the power supply of the electric pressure cooker or cancel the heat preservation function after the electric pressure cooker enters the heat preservation state, and then put a wet towel on the lid of the electric pressure cooker, which can quickly reduce the temperature in the cooker and quickly open the cooker.