1. Frost's Descent is the eighteenth solar term of the twenty-four solar terms and the last solar term in autumn. Dou Zhixu; the sun's longitude is 210°; the festival is held on October 23-24 every year in the Gregorian calendar. Frost does not mean "frost", but means a sudden drop in temperature and a large temperature difference between day and night. In the frost season, all things are completed and completed in Xu, the sun sinks to the ground, the yin energy begins to condense, and the weather becomes colder starting with the frost. After the frost season, the late autumn scene is obvious, and cold air moves southward more and more frequently.

2. On average across the country, frost is the time of year with the largest temperature difference between day and night. The characteristics of the frost solar term are that the weather is colder in the morning and evening, and hotter at noon. The temperature difference between day and night is large, and autumn dryness is obvious. Frost Descent does not mean that "frost will fall" when entering this solar term. In fact, "frost" does not fall from the sky. "Frost" is the condensation of water vapor on the ground when it encounters cold air due to changes in temperature. "It's irrelevant, the two are not the same concept.

3. The frost festival mainly includes the customs of appreciating chrysanthemums, eating persimmons, climbing high and overlooking the distance, and taking supplements. The frost season is the turning point of autumn and winter climate, and it is also the transition of Yang Qi from receiving to storing. The key to health care should be to "keep out the cold on the outside and clear away the heat on the inside". There is a saying among the people that "winter nourishment is not as good as frost nourishment". Autumn belongs to gold, and the spleen and stomach are the foundation of acquired diseases. At this time, it is advisable to nourish the spleen and stomach to nourish acquired diseases.