1. long summer is one of the 24 solar terms. On May 5th or 6th every year, the solar term of long summer is 45 degrees when the sun reaches the yellow meridian. Since ancient times, China has been used to taking long summer as the day when summer begins. At this time, the yellow meridian of the sun is 45 degrees. In astronomy, long summer said that it is the beginning of a summer day to bid farewell to spring. People used to regard long summer as a place where the temperature rises obviously, the summer is approaching, thunderstorms increase and crops enter the peak season.

2. The "summer" of "long summer" means "big", which means that the plants sown in spring have grown upright. At a deeper level, the 24 solar terms reflect the change of "Qi" in the four seasons, and the change of Qi is related to the change of natural rhythm. long summer's yang is getting longer and longer, and everything grows sturdily with the rise of yang. In ancient times, people attached great importance to long summer's manners and customs. On this day in long summer, people in ancient times held a ceremony to welcome summer.

3. The significance of long summer: long summer said that it is the beginning of summer to bid farewell to spring.