October 23 7:00 "frost": trees are autumn, mountains only sunset
Reporter Zhou runjian
Xinhua news agency, Tianjin, October 21 (China astronomical almanac) shows that at 7:00 on October 23, Beijing time will usher in the "frost" solar term. At this time, autumn is coming to an end, and the meaning of autumn gradually fades away.
Luo Shuwei, a historian and researcher at Tianjin Academy of Social Sciences, said that "frost fall" is the 18th solar term among the 24 solar terms, the last solar term in autumn, and the solar term for the transition from autumn to winter. "Frost" means that the weather is getting colder and colder. In the morning, the water vapor on the ground meets the cold air at night and condenses into frost flowers. That is to say in the ancient book "interpretation of the twenty four solar terms" that "the air is quenched and the frost falls, and the Yin begins to condense.".
With the advent of "frost", crops, plants and plants are constantly yellowing and falling leaves. At this time of the festival, although the leaves fall and the flowers wither, the beauty of autumn is to the extreme. "All trees and trees are in autumn, the mountains and mountains are only in the sunset", the streets and lanes are full of brocade, "frost leaves are red than February flowers".
From the beginning of "frost", the cold air activity is frequent. With the continuous occurrence of gale weather, the temperature drops suddenly. Various common respiratory infectious diseases such as influenza are very easy to attack human body.
Luo Shuwei suggested that we should pay attention to the air circulation of living, working and learning environment; we should wear masks when we go to places with dense population; we should develop good hygiene habits, wash hands and gargle frequently; we should keep moderate exercise and go to outdoor activities to strengthen our physique; we should avoid excessive fatigue and pay attention to living in a proper way and supplement nutrition.