The origin of the first frost solar term and its introduction

1. Origin of the first frost solar term: The first frost in the twenty-four solar terms is when the sun reaches the longitude of 2 10 on the 23rd of the Gregorian calendar every year. 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. Water vapor in the air 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. Twenty-four solar terms say the first frost: in mid-September, the gas condenses and becomes frost. 20 17 on the origin of the first frost solar terms 20 17 on the origin of the first frost solar terms. "First frost" means that the weather is getting colder and the dew condenses into frost. In ancient China, the first frost was divided into three stages: first, the jackal sacrificed animals; Second, the vegetation is yellow; Three stings are salty. The jackal began to catch prey, sacrifice animals, and return books to heaven with animals, paving the way for sacrificing autumn gold; The leaves on the earth turned yellow and fell; The stinging insects are motionless in the cave and hang their heads into hibernation.

2. The first frost is the18th solar term among the 24 solar terms. The first frost is regarded as the day when the sun reaches 2 10 every year from 22 to 24 on Gregorian calendar10. 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.

3. The ancients in China divided the first frost into three stages: the jackals were sacrificial animals, the vegetation was yellow, and the stinging insects were salty. In the first frost season, most parts of the north have entered the autumn harvest, and even cold-resistant onions can't grow again. 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 soil preparation.

4. The solar terms in the first frost mainly include the customs of enjoying chrysanthemums, eating persimmons, climbing high and overlooking, and tonic. The first frost season is the turning point of autumn and winter climate, and it is also the transition of the spirit of the sun from being hidden. The key to health care should pay attention to "keeping out the cold outside and clearing heat inside". There is a folk saying that it is better to make up the first frost in winter. In autumn, the spleen and stomach are the foundation of the day after tomorrow. At this time, tonic is appropriate, especially strengthening the spleen and nourishing the stomach to nourish the day after tomorrow. In the first frost season, most parts of China enter the dry season, so we should attach great importance to forest protection and fire prevention.