What is the origin of the Millennium solar terms?

1. With the coming of late autumn, the climate changes from hot to cold, and everything is born with cold and gradually falls. Due to the large temperature difference between day and night, the water droplets condensed by water vapor near the ground at night are called "dew" and "white dew" because of their white color, hence the name "white dew".

2. The Millennium is an important festival reflecting the temperature change in nature. At this time, the sultry summer is basically over, which is the turning point from hot to cold in autumn.