Legend has it that Chang 'e was originally the wife of Hou Yi. After Hou Yi shot nine suns, the Queen Mother of the West gave her the elixir of youth, but Hou Yi refused to take it, so she gave it to Chang 'e for safekeeping. Hou Yi's disciple Peng Meng coveted the fairy medicine and forced Chang 'e to hand it over. Chang 'e swallowed it in desperation and flew to the sky.

It was the 15th of August, and the moon was big and bright. Because of giving up Houyi, Chang 'e stopped at the moon closest to the earth and lived in Guanghan Palace for a long time. After returning home, Hou Yi was heartbroken, so he put a banquet on August 15th every year to meet Chang 'e with the moon.

The origin of moon cakes:

Ancient moon cakes were eaten as sacrifices in the Mid-Autumn Festival. It is said that the custom of eating moon cakes in Mid-Autumn Festival began in the Tang Dynasty. It was popular in the court in the Northern Song Dynasty and later spread to the people. At that time, it was commonly known as "small cake" and "moon group". In the Ming Dynasty, it became a common dietary custom of the whole people. Moon cakes are mixed with local food customs, and are loved by people all over China.