The meaning of the Millennium

"White dew" means that the dew in autumn is one of the twenty-four solar terms. From "The Book of Songs Qin Feng Jiajian": "The armor is pale and the white dew is frost." "The Book of Rites and the Moon Order": "The cool wind comes, the dew falls, and the cicadas sing."

Millennium is the 15 solar term in the "twenty-four solar terms", and the third solar term in autumn is the end of the application of the moon in the lunar calendar and the beginning of the unitary month. When the sun reaches 165 degrees, it will cross the Gregorian calendar on September 7-9. "White dew" is an important solar term reflecting the growth of cold in nature. As the weather turns cold, it is sunny and hot during the day, but the temperature drops quickly after evening, and the temperature difference between day and night is large.

During the white dew, the summer monsoon is gradually replaced by the winter monsoon, and the cold air changes from defense to attack. In addition, when the direct point of the sun moves south, the sunshine time in the northern hemisphere becomes shorter, the light intensity weakens, and the ground radiation dissipates heat quickly, so the cooling speed gradually accelerates. The Millennium basically ended the sweltering heat in summer, and the weather gradually turned cold, and the cold gave birth to dew condensation. The ancients used four seasons with five elements. Autumn belongs to gold, gold and white alternate with each other, and autumn dew is described in white, hence the name "White Dew".

According to the observation of nature, the ancients in China divided the Millennium into three stages: "When the geese come, the mysterious birds return, and the birds are ashamed." This means that in this solar term, migratory birds such as Hongyan and Swallow fly south to avoid the cold, and hundreds of birds begin to store dried fruit food for the winter. At present, farmers are also busy harvesting crops. As the saying goes, "If you grab autumn, you will lose it." During the Bailuyuan period, local folk customs mainly included offering sacrifices to Dayu, brewing grain wine and drinking Bailuyuan tea.