Cooking emits a "beep beep" sound; please check whether it is due to the following reasons:
1. The water tank has not been placed back into the oven. If so, push the water tank back into the water oven until you hear a "click" sound, which means it is properly installed.
2. The screen shows a "WATER" icon flashing. If so, it indicates the water tank is empty. Please open the small lid or the entire cover and add room-temperature boiled water / distilled water until it reaches the full level. Make sure the water fill cap is properly closed, then push the water tank back into the water oven until you hear a "click" sound, which means it is properly installed.