What is the moral of solar terms in beginning of autumn?

1, beginning of autumn, is 13 of the 24 solar terms of the lunar calendar, which started in autumn.

2. The standard of solar terms in beginning of autumn marks the formal establishment of autumn, but autumn is a period of alternating cold and hot. Guan said, "Autumn begins in the shade, so everything is harvested."

3. After beginning of autumn entered the solar term, the climate began to transition from rainy and humid in summer to dry and rainy in autumn; In nature, the qi of Yin and Yang begins to change, Yang gradually recedes, Yin gradually forms, and everything gradually declines with the sinking of Yang.