First, the source of the summer heat:
The origin of the solar term "Chu Xia" can be traced back to the book twenty-four solar term in ancient China. It is recorded in the book: "When you go, you will go, and the summer heat will stop here." It means that "Chu" means "termination", which means that the hot summer is coming to an end and the hot summer day is coming to an end.
This solar term is on August 23rd or 24th of the Gregorian calendar every year, when the sun reaches 150 degrees. Since then, the summer vacation has become an important solar term in China traditional culture, which has been used ever since.
Second, the historical origin of the summer heat:
"Shuo Wen Jie Zi" said: "Place, stop. "Summer heat" means that the hot and difficult weather has come to an end and the summer heat has begun to fade. "Three summers" and "three volts" both represent hot and humid weather, and the curves on the time axis and the temperature axis are basically the same: summer days come, and summer days arrive; When the sky goes down, the summer will be over.
Twenty-four solar terms have "three summers", that is, a little summer term, a big summer term, and a summer term, which are in the order of early summer, heatstroke and late summer. There is also a "beginning of autumn" solar term in the middle of the "Three Summertime", and it is the summer after beginning of autumn, and the summer heat lasts for a long time. The long summer heat is beneficial to the growth and yield of crops. The ancients called the period from beginning of autumn to the autumnal equinox "Long Summer".
Poems describing the summer heat
1, away from the summer, the cool wind is blowing. -Tang Bai Juyi's "Early Autumn Qujiang Feeling"
The thick clouds with summer heat gradually dispersed, blowing to the earth with autumn breezes.
2, there is no three days in the summer, and it is new and cool. -Song Su Su's Two Poems on the Yangtze River (Part One)
Just three days after the summer heat, there was a cool breeze. This comfortable feeling can't be bought for thousands of dollars.
3. Summer retreats before the wind, and autumn comes after the rain. -Song Su Su's Two Poems on the Yangtze River (Part II)
The summer heat gradually dissipates, ushering in the autumn wind, while autumn begins after the rain.
4. After three days in the summer, the plateau was full of plows. -Song Dynasty Wang Zhidao's Autumn Rain-loving Topic Zhou Cai's Old Wall
There are only three days left in the summer, so we can plow the fields.
5, the wind drives the rain, and the summer heat sweeps the air. -Song Dynasty Chou Yuan's "Wind and Rain after Summer"
Strong winds accompanied by showers swept away the remaining summer heat.