What is the complete meaning of autumn solar terms?

. "The bucket refers to the autumnal equinox, and the northern and southern hemispheres are equally divided day and night, which is half autumn, hence the name." The longitude of the sun is 180 degrees, and the solar calendar is from September 22 to 24 every year. According to the old calendar, the autumnal equinox happens to be the midpoint of ninety days in autumn. Just like the vernal equinox, the sun is almost direct to the equator, and the length of day and night is equal again. It can be said that the autumnal equinox is a very special day. From this day on, the position of direct sunlight continued to move from the equator to the southern hemisphere, and the northern hemisphere began to have shorter days and longer nights. It is recorded in the Spring and Autumn Annals: "The autumnal equinox is half cloudy and half sunny, so it is cold and hot day and night." In astronomy, the autumnal equinox is considered as late summer and early autumn. To be exact, autumn in the northern hemisphere begins at the autumnal equinox. At this time, most parts of our country have entered the cool autumn, and the cold air from the south meets the gradually decaying warm and humid air, resulting in repeated precipitation and temperature drop. As people often say, it's time for "an autumn rain and a cold", but the daily precipitation after the autumnal equinox will not be great. At this time, the field farming in the south and the north is different. In northern China, there is an agricultural proverb that says: "The white dew is early, the cold dew is late, and it is the right time to plant wheat in the autumn equinox." Proverbs clearly stipulate the sowing time of winter wheat in this area; And "White clouds come in autumn equinox, good songs and good rice seeds are everywhere" reflects the planting time of rice in Jiangnan area. In addition, the taboos of working people on the solar terms of the autumnal equinox are also summed up as proverbs, such as "the autumnal equinox is only afraid of lightning, and more meters are more expensive."