If it's an unopened moon cake, it can be stored in the refrigerator directly, and it can be taken out directly when eating. Moon cakes, also known as moon cakes, harvest cakes and reunion cakes, are one of the traditional Han cuisines in China. Moon cakes were originally used as offerings to worship the moon god. Offering sacrifices to the moon is a very old custom in China, and it is actually a worship activity of the ancients to the "Moon God". Eating moon cakes and enjoying the moon in the Mid-Autumn Festival is an indispensable custom in the northern and southern parts of China.