When was Shang Yuanzhong and Xia Yuanyuan?

"Sanyuan" is Shangyuan (Lantern Festival, the 15th day of the first lunar month), Zhongyuan Festival (the 15th day of the seventh lunar month) and Xia Yuan (the 15th day of the tenth lunar month), which are all traditional festivals in China.

Shangyuan Festival is the traditional Lantern Festival in China. The first month is January, and the fifteenth day is the first full moon night in a year, so it is called the Lantern Festival. That is, "Shangyuan Festival".

The Mid-Autumn Festival is scheduled for July 15th of the lunar calendar, commonly known as July 30th. Legend has it that all ghosts are released in the underworld on this day, and people usually carry out activities of offering sacrifices to ghosts.

The 15th October of the next Yuan Dynasty lunar calendar is a traditional folk festival in China. The origin of the next Yuan Festival is related to Taoism. There are three officials in Taoism, namely, heaven official, earth official and water official.