What do the 24 solar terms and the first frost mean? Introduction to the meaning of the twenty-four solar terms and the first frost.

1, the first frost solar term is 18 of the 24 solar terms in China. The first frost is considered when the sun reaches the longitude of 2 10 every year from 22 to 24 in Gregorian calendar 10. As the last solar term in autumn, the first frost is the transition from autumn to winter. There is no frost in the first frost, but it means that the weather is cold and there will be first frost on the earth. The ancients in China divided the first frost into three stages: jackals sacrificing animals, yellow vegetation and stinging insects. In the first frost season, most parts of the north have entered the autumn harvest, and even cold-resistant onions can no longer grow. In the south, it is the peak season of "Sanqiu". Only single-season hybrid rice and late rice are harvested, and early-season wheat and early-season rape are planted. Picking cotton, pulling cotton stalks, ploughing and preparing soil, and so on.

2. The first frost solar term is about Gregorian calendar1October 23rd, when the sun reaches the longitude of 2 10 degrees, the first frost is among the 24 solar terms. The first frost is the last solar term in autumn, which is the transition from autumn to winter. There is a lot of heat dissipation on the ground in autumn, and the temperature suddenly drops below 0 degrees. The water vapor in the air of frosted plants directly condenses on the ground or plants to form fine ice needles, and some become hexagonal frost flowers, which are white and loose in structure. It is necessary to add clothes when it is cold.