How to explain the ten-day frost?

Ten-day frost is one of the traditional solar terms in China. Ten-day frost is the seventeenth of the twenty-four solar terms, and the time is 65438+February 7 every year. At this time, the temperature drops obviously, the weather is cold and dry, and there will be frost. The name of this solar term comes from the phenomenon that the frost period is ten days, which indicates that winter has entered an in-depth stage, and people should start to pay attention to keeping warm and cold.