What is the origin and origin of the long summer? What are the legends and stories in Changxia?

Long summer is the seventh solar term in the twenty-four solar terms of the lunar calendar. The first solar term in summer indicates the official start of the season in Xia Meng, and it is also the long summer solar term when the sun reaches 45 degrees of the yellow meridian. The bucket refers to the southeast, and the dimension is long in summer. Everything has grown to this day, hence the name Long Summer.

The origin of solar terms:

Long summer is a solar term established at the end of the Warring States Period (239 BC), which indicates the change of four seasons and the beginning of summer in four seasons.

In fact, according to the standard of climatology, the daily average temperature rises to above 22℃ steadily, starting from summer. Before and after the "Long Summer", only the area south of Fuzhou-Nanling Line in China is really "the trees are dark in midsummer, and the balcony reflects the pond", while some areas in the northeast and northwest have just entered the spring, and the average temperature in most parts of the country is around 18 ~ 20℃, which is ". In May, Sophora japonica blooms in many places. In the long summer, everything is thriving.