What do you mean by freezing in the cold, knowing that you are happy, and frost and snow cover rivers and mountains?

Describe slight cold. When you are cold, you know how to be happy. Frost and snow cover mountains and rivers, saying that there is nothing wrong with winter. You can also have a faint sense of happiness when you are cold. The first frost and heavy snow covered the mountains and rivers. This sentence describes the slight cold in the 24 solar terms. Slight cold is the 23rd solar term in 24 solar terms, and winter is the 5th solar term. When the sun reaches 285, it is the winter solstice.