Why do people need to prevent autumn dryness in the "Millennium" season?

The first two solar terms in autumn are sultry. Generally, autumn is really cool until after the Millennium solar terms, and it gradually tends to be cool and dry from the Millennium solar terms. In late autumn, the climate turns from hot to cold, and everything comes into being with cold and gradually falls. Due to the large temperature difference between day and night, the water droplets condensed from the water vapor near the ground when it is cold at night are called "dew" and "white dew" because of their white color. So the name of the Millennium came from this.

Millennium is an important festival reflecting the temperature changes in nature. At this time, the sultry summer has basically ended, which is the turning point of autumn from hot to cold.