1, the origin of Xiayuan Festival is related to Taoism. Taoism worships the three gods of heaven, earth and water, which are called three officials, namely, heaven official, earth official and water official; Also known as Sanyuan, namely Shangyuan, Zhongyuan and Xia Yuan. The birthdays of these three officials are the 15th day of the first lunar month, 15th day of July and 15th day of October, so these three days are called Shangyuan Festival, Zhongyuan Festival and Xiayuan Festival, which are Taoist festivals.

2, the custom of the next yuan festival: pray for the gods. From the evolution of sacrificial contents and objects, the Next Yuan Festival has been integrated into many sacrificial customs in agricultural production, and has become another agricultural festival to worship gods, pray for evil spirits and a bumper harvest. Enjoy ancestor worship first. Enjoying ancestor worship is not only the embodiment of ancestor belief, but also a prayer for ancestors to protect their descendants. Eat seasonal food. On the day of the next Yuan Dynasty, villagers cooked rice cakes at home, presented them to relatives and friends, and steamed rotten buns. This is also the happiest day for rural children in the past. They can eat many fruit foods called "Fuyu" after the sacrifice.