Natural Lantern Festival, also known as Shangyuan Festival, Xiaoyuanyuan Festival, Yuanxi Festival or Lantern Festival, is the 15th day of the first lunar month every year and one of the traditional festivals in China. The ancients called "night" night, and the fifteenth day of the first lunar month was the first full moon night of the year, so it was called "Yuanxiao".
According to the Taoist theory of "Sanyuan", the fifteenth day of the first month is also called "Shangyuan Festival". Since ancient times, the custom of Lantern Festival has been based on the warm and festive custom of watching lanterns. The formation of Lantern Festival custom has a long process. According to general data and folklore, the fifteenth day of the first month was paid attention to in the Western Han Dynasty. On the night of the first month, Emperor Wu of the Han Dynasty offered sacrifices to "Taiyi" in Ganquan Palace, which was regarded by later generations as the first sacrifice to the gods on the fifteenth day of the first month.