1. On the summer solstice, the position where the sun directly hits the ground reaches the northernmost point of the year, and it takes about 14 hours from sunrise to sunset in the south of China. Although the summer solstice has the longest day and the highest sun angle, it is not the hottest time of the year. Because, close to the surface of the heat, at this time still continue to save, did not reach the maximum time. (You can choose to copy)

2. After the summer solstice, due to the vigorous growth of crops and the rapid growth and spread of weeds and pests, agricultural production in most parts of southern China entered the field management period.

This shows that the weather changes quickly.

For example, in the past 30 years, there were few large-scale floods in the west of South China in late June, but the degree was serious.

Definition: According to the theory of traditional Chinese medicine, the summer solstice is the season with the strongest yang, and health preservation should conform to the characteristics of abundant yang in summer.