A sign of summer?

Summer begins with 24 solar terms, and early summer begins with long summer. It's summer. Besides, summer is marked by hot weather. Most of the early summer in the south is above 30 degrees, and the temperature in the early summer in the north is slightly lower, which is also around 20 degrees. In midsummer, the weather is very hot, the trees are lush, everything is lush, and the earth is full of vitality.