What is the significance of introducing cold dew solar terms?

1. Cold dew is the seventeenth solar term in the twenty-four solar terms of the lunar calendar and belongs to the fifth solar term in autumn. Every year1October 8 or 9, when the sun reaches longitude 195, it is cold dew. 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. White dew, cold dew and first frost all indicate the phenomenon of water vapor condensation, and cold dew is the transition from cold to cold.

2. The ancients in China divided the cold dew into three stages: one stage was the swan goose; Second, the sparrow enters the water and becomes a clam; Three chrysanthemums have yellow flowers. In the cold dew season, China Nanling and the vast areas north of it have entered autumn, the northeast has entered late autumn, and the northwest has entered winter or is about to enter winter. The traditional customs of cold dew mainly include enjoying maple leaves, eating sesame seeds, eating crabs and drinking autumn tea.

In this festival, the climate is getting colder and the temperature drops day by day. The public should eat more sweet, light and moist food in diet conditioning to prevent "autumn dryness" from hurting people.