What is the origin of summer solar terms?

When the sun reaches longitude 150, it is the heat of the 24 solar terms of the lunar calendar. Summer is a solar term reflecting the temperature change. . The origin of summer solar terms naturally comes from the legend of the origin of twenty-four solar terms, and in some ancient books, summer solar terms mean that summer has passed, that is, hot holidays. People will hold various traditional activities in summer.

"Twenty-four solar terms" said: "Go, go, the heat is over." "Chu" means termination, which means that the summer heat is about to pass, the summer heat will end on this day, and the temperature in most parts of China will gradually drop. Being in summer is not only different from mild summer, severe summer, slight cold and severe cold, but also represents the transition from hot to cold.

In midsummer, the temperature enters a stage of significant change, and it drops day by day, and the summer heat is no longer threatening. This change in festivals is naturally reflected in farming. A large number of practical proverbs left by the ancients, such as "an autumn rain and a cold".