Every year on the fifteenth day of the eighth lunar month, it is the traditional Mid-Autumn Festival. This is the middle of autumn of the year, so it is called the Mid-Autumn Festival. In the Chinese lunar calendar, a year is divided into four seasons, and each season is divided into three parts: Meng, Zhong, and Ji, so the Mid-Autumn Festival is also called Zhongqiu. The moon on August 15th is rounder and brighter than the full moon in other months, so it is also called "Yuexi" and "August Festival". On this night, people look up to the bright and bright moon in the sky, and naturally look forward to family reunion. Travelers who are far away from home also use this to pin their thoughts on their hometown and their relatives. Therefore, the Mid-Autumn Festival is also called "Reunion Festival".