Number One
Astronomical Significance
Peak of Solar Power: Xiazhi marks the time when the sun reaches its highest point in the sky at noon, resulting in the longest day and the shortest
night of the year. This is the peak of the sun's power, symbolizing the zenith of summer.
Turning Point: After Xiazhi, although the days start to shorten, the heat continues to intensify, leading to the hottest period of summer. This
transition signifies the dynamic balance in nature.
