It's late autumn, it's freezing, and the vegetation is shaking and frosting.

The autumn wind is bleak, the weather is cool, and the vegetation is shaken and exposed to frost. The group of Yan resigned to solitary south lane, thinking about gentlemen and guests.

There is only one poem in front: the autumn wind is bleak and it is freezing. The meaning of this poem is: vegetation withers and dew condenses into frost. From Cao Pi's Ge Yanxing.

The first frost is the eighteenth of the twenty-four solar terms and the last solar term in autumn. Fight with your fingers; The solar calendar is 210; Celebrate every year on 10/23-24 of the Gregorian calendar. After entering the first solar term in first frost, the scene of late autumn is obvious, and cold air moves southward more and more frequently. The first frost does not mean "frost", but refers to the sudden drop in temperature and the large temperature difference between day and night. On the national average, "first frost" is the season with the largest temperature difference between day and night in a year.

In the first frost season, it's all over. From the morning, the sun went down to the ground, Yin Qi began to condense, and the first frost weather became colder and colder. Because "frost" is a manifestation of cold weather and large temperature difference between day and night, it is named "first frost", which means "sudden drop in temperature and large temperature difference between day and night". The first frost solar terms are characterized by cold weather in the morning and evening, hot weather at noon, large temperature difference between day and night, and obvious autumn dryness. The solar terms in the first frost mainly include the customs of enjoying chrysanthemums, eating persimmons, climbing high and overlooking, and tonic.