2. Because the temperature of the frozen dumplings is low, the heating time in the microwave oven is slightly longer. Generally, it takes 5 minutes for the frozen dumplings to be heated in the microwave oven. If it is a vacuum-packed frozen zongzi, you need to cut the outer packaging bag first, then peel it off and put it into a container that can be heated. Pour a proper amount of clear water into the container until the amount of clear water is half that of the zongzi, and then put it in a microwave oven for about 5 minutes, and then take it out for eating.