Moon cake, also called moon group, harvest cake, palace cake, reunion cake, etc., is the ancient Mid-Autumn Festival to worship the moon God tribute. Mooncakes were originally used to offer offerings to the god of the moon, and later people gradually came to enjoy the moon and taste mooncakes as a symbol of family reunion. Mooncakes symbolize happy reunion. People regard them as festival food, offering sacrifices to the moon and presenting them to relatives and friends. Historically, eating mooncakes was not an indispensable activity for the Mid-Autumn Festival, and there were no mooncakes specially made for the Mid-Autumn Festival to eat during the Tang and Song dynasties. However, since the Mid-Autumn moon cake appeared in the Ming Dynasty, it has become a necessary part of the Mid-Autumn Festival custom. The first moon cake originated from the Tang Dynasty army celebration food. During the reign of Emperor Gaozu of the Tang Dynasty, General Li Jing conquered the Turks by means of mooncakes and returned on August 15. Since then, eating mooncakes has become an annual custom. The name "mooncake" was first mentioned by Zhou Mi, a writer of the Song Dynasty, in his book "Old Stories of Wu Lin", which he saw in Lin ‘an, the capital city of the Southern Song Dynasty. In the Ming Dynasty, eating moon cakes in the Mid-Autumn Festival gradually spread among the people. At that time, the skillful cake chef printed the fairy tale of Chang ‘e flying to the moon as a food art pattern on the moon cake, making the moon cake become more popular with the people‘s Mid-Autumn Festival essential food. Today, eating moon cakes has become an indispensable custom in the north and south of China to celebrate the Mid-Autumn Festival. On this day, people will eat moon cakes to show "reunion".