What are the nicknames of Chu Shuang?

There is an nickname in the ancient frost called Jueqiu. The first frost is also called "severe frost", "frost knife" and "frost sword"

The ancients in China divided the first frost into three stages: the first stage was the sacrifice of animals by jackals; Second, the vegetation is yellow; Three stings are salty. At this time, jackals and other animals began to catch prey for the winter; The leaves are all yellow and falling; Hibernating animals also hide in caves and go into hibernation without food.

Because "frost" is the expression of cold weather and large temperature difference between day and night, it is named "first frost" for this festival, which means "the temperature drops suddenly and the temperature difference between day and night is large". The "first frost" solar term reflects the climatic characteristics of the cold weather, but it does not mean that it will be "frost" when entering this solar term. In fact, "frost" didn't fall from the sky. The "frost" is the condensation of water vapor on the ground when it meets cold air due to the change of temperature difference. The solar term "first frost" has nothing to do with "first frost".