What is the meaning of long summer and long summer?

1, the meaning of long summer-farewell to spring, long summer.

2. The solar term "Long Summer" was established at the end of the Warring States Period (239 BC), indicating the replacement of the four seasons and the beginning of the summer of the four seasons.

3. In fact, according to the climatological standard, 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 summer trees are deep 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℃. In May, Sophora japonica blooms in many places.