What are the historical origins of solar terms in summer and what are the traditional customs in summer?

Summer is when the sun reaches longitude 150. Summer is mainly a solar term reflecting the temperature change, which means hiding, not ending, that is to say, the hot summer is over.

"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.

China divided the summer heat into three periods: "The eagle is a sacrificial bird; Second, wait for the beginning of heaven and earth; Three Hou Wonaideng. " This season, eagles began to hunt a lot, and everything began to go downhill. The poem says: "As soon as the summer heat comes out, it is too late for the autumn wind to send you cool. On a day trip, under the oblique light of the south path, we cut the rice and drove through the horse pond. (Heshui Zuo) "After the intense heat, the rainy season is coming to an end in most parts of China except South China and Southwest China, and the precipitation is gradually decreasing, and the rice is ripe for harvest. Especially in North China, Northeast China and Northwest China, we must pay close attention to water storage and moisture conservation. If there is drought during autumn sowing, the sowing date of winter crops will be postponed.