qiū fēng
秋 分
the Autumn Equinox
秋分是秋季的第四个节气。秋分日后，太阳光直射位置南移，北半球昼短夜长，昼夜温差加大，气温逐日下降。秋分的“分”有两个含义，一是“季节平分”，二是“昼夜平分”。
The autumnal equinox is the fourth solar term of autumn. After the autumnal equinox, the position of direct sunlight shifts southward, and the days in the northern hemisphere are shorter and the nights are longer, the temperature difference between day and night increases, and the temperature decreases day by day. The "equinox" of the autumn equinox has two meanings, one is "equinoxical equinox" and the other is "equinoxical day and night".
