It's early rain and late autumn, and the chill attacks people. What do you mean?

The first rain and cold in late autumn mean that the second solar term in early spring is the coldest time, and it is still relatively cold now. The third nine appears during the winter solstice to the period of fright, and rain is just a solar term before fright. As the old saying goes, 3949 froze the old dog to death.

The first frost, the last solar term in late autumn, gets colder every day and gradually enters winter. The Book of Changes says: "first frost is hard to ice", that is to say, when you see first frost, you should know that during the first frost solar terms, the weather becomes cold and frozen.