Guess: What is the meaning of "summer" in the ancient "Long Summer" solar term?

Xia represented the Central Plains and Central China at that time, that is, the territory ruled by the Xia Dynasty, while the ethnic minorities in the Quartet were called "barbarian soldiers". Over time, people in all directions call people living in this area "Xia" Xia, or simply Xia. Therefore, "summer" not only represents this area, but also represents people living in this area.

Meteorological changes of solar terms in long summer

After the long summer officially entered the rainy season, rainfall and rainy days increased significantly. Summer is the best season for many crops to grow vigorously. Adequate light, suitable temperature and abundant rain provide necessary conditions for plants. ?

In summer, affected by the warm and humid air flow from the ocean, the southern region is generally hot, humid and rainy. Qinling-Huaihe river basin is a transitional area between rainy south and rainy north. From the vicinity of Huaihe River in Qinling Mountains to the north, the rainfall decreased sharply.

Because China has a vast territory and a large span from north to south, natural rhythms vary from place to place. Before and after the "long summer", only the area south of Fuzhou-Nanling line in China may enter summer, and most of the rest areas are still in spring, and some areas in Northeast China and Northwest China even just entered spring at this time.