What does it mean that northerners will be "cat winter" when they are "slightly cold and frozen into a ball"?

Cats spend the winter at home, which generally means staying at home. "Cat" means "hide" in Northeast dialect. When used in this sense, the subject of "cat" is generally people, and it is sometimes used to describe the cat winter strategy adopted by enterprises when the economic situation is not good.

Cat winter is the wisdom of people in northern China to cope with the cold winter. The specific way is to store food in the cellar or yard for one winter in advance. Chinese cabbage and potatoes can provide enough vitamins. The acquisition of protein depends on the twelfth lunar month, and the pigs to be slaughtered are fat enough.

Severe cold weather change

During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down.

When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of the northwest wind and the constantly supplemented cold air, China will have a sustained low temperature. In some parts of China, severe cold is not as cold as slight cold, but in the southern coastal areas of China, the lowest temperature in a year appears in the severe cold solar terms.