The origin and custom of millennium solar terms. How did the Millennium solar terms come about?

1, Bailu is one of the twenty-four solar terms of the lunar calendar, and it is the Bailu solar term when the sun reaches 165 degrees. Millennium is the third solar term in autumn, marking the end of Qiu Meng and the beginning of Mid-Autumn Festival. Dew is water droplets formed by condensation of water vapor on the ground or near-earth objects due to temperature drop. So the Millennium actually indicates that the weather is getting cold.

At this time, people will obviously feel that the hot summer has passed and the cool autumn has arrived. The temperature difference between day and night can reach more than ten degrees. Yang Qi reached its peak in the summer solstice, and these two extremes must be reversed, and Yin Qi also rose at this time. When it comes to the White Dew, the yin gradually increases, and the morning dew gradually thickens and condenses into a layer of white water drops, so it is called the White Dew.

There is a custom of "picking clear dew" in the Millennium solar terms. In Li Shizhen's Compendium of Materia Medica in the Ming Dynasty, it was recorded: "When the autumn dew is numerous, it is gathered on a plate and fried like rice, which makes people not hungry." Thus, dew-clearing has become the most special "ceremony" in the Millennium. There are also folk customs such as offering sacrifices to Yu Wang, eating longan, drinking Bailu tea, and drinking Bailu rice wine. In some areas, fresh food such as lotus seeds and lilies will be eaten before and after Bailu.