What do you mean by white dew and cold dew? What are white dew and cold dew?

1, Bailu is the fifteenth solar term among the twenty-four solar terms, and it is also the end of the applicable month and the beginning of the unitary month in the calendar; The time is from September 7th to 9th every year in Gregorian calendar, when the sun reaches 165 degrees. "Twenty-four solar terms" said: "In August, the yin is getting heavier and the dew is white." As the weather gets colder and colder, you will find many dewdrops on the ground and leaves in the morning, which is named after the water vapor condenses on them at night. The ancients used four seasons with five elements, and autumn was golden and golden white, so white was used to describe autumn dew. After entering the "Millennium", I will feel a little cold at night.

2. Cold dew is the seventeenth solar term in the twenty-four solar terms of the lunar calendar, belonging to the fifth solar term in autumn, which indicates the official start of the autumn season; The time is1October 7-9, 10. When the apparent sun reaches longitude 195. "Twenty-four solar terms" said: "In September, the dew is cold and will condense." Cold dew means that the temperature is lower than that of the white dew, and the dew on the ground is colder and will soon condense into frost. In the cold dew season, Nanling and the vast area to the north have entered autumn, the northeast has entered late autumn, and the northwest has entered winter or is about to enter winter.