What's the meaning of this picture of the twenty-four solar terms of Yin and Yang?

The significance of this 24 solar terms Yin and Yang diagram may be as follows:

1. The white circle outside represents the celestial equator.

There are 24 points evenly distributed on the circumference, and each point represents 1 solar term.

2. The white dot at the center of the circle is the observation point (Earth).

3. The yellow dot represents the track of the direct point of the sun all the year round.

The line between the yellow dots is the ecliptic (the projection of the earth's orbit around the sun on the celestial sphere).

4. The white line in the circle represents the corresponding relationship.

The solar terms corresponding to the two ends of each white line are central symmetry when the connecting line of the direct point of the sun just passes through the earth.