When using a rotary microwave oven, the container for holding food must be placed in the special tray of the microwave oven, not directly in the oven cavity. If the whole bag of food is attached with a metal clip, it should be removed first, and the metal strip of the plastic cooking bag should be tied tightly, so it is not suitable for use. If sparks appear in the furnace, stop the furnace immediately. After the food is put in, close the oven door and ensure that the interlock switch and safety switch are closed. When heating, people should stay away from the microwave oven or at least away from the microwave oven 1 m to reduce radiation.