A frost and a persimmon means autumn cold, a drop of red, and winter.

A frost and a persimmon means autumn cold, a drop of red, and winter.

This is a poem about the first frost solar terms, which means: when the first frost comes, the persimmon turns red, which means the arrival of autumn; When the temperature drops, the color of persimmons will gradually turn red, which means that winter is coming. A frost and a persimmon mean autumn cold, and a drop of red gradually grows into winter, which is a poem written by Wu Cheng, a scholar in the Yuan Dynasty.

The book "Twenty-four Solar Terms" by Wu Cheng, a scholar in Yuan Dynasty, recorded 72 periods in China's ancient farming culture. These seasons refer to the specific periods of each month in the four seasons, which are used to guide farmers' farming and planting activities.

A frost and a persimmon mean autumn cold. A frost in this sentence refers to the first frost in autumn. In the traditional culture of China, the first frost is an important solar term in autumn, which indicates the arrival of winter. At the same time, persimmon refers to persimmon, which gradually turns red in autumn and is the representative fruit of autumn. This sentence expresses the coldness and desolation of autumn through the images of persimmon and first frost, which implies the change of seasons and the change of nature.

One drop in the sentence "One drop is red and one winter is red" refers to the gradual decrease of temperature, which indicates the coming of winter. Red means that the leaves turn red gradually, which is a clear sign of the transition from autumn to winter. This sentence depicts the change of natural landscape and the change of seasons through the image of cooling and red leaves, and expresses people's awe of the beauty of nature.

Meteorological changes of the first frost

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. On the national average, the first frost is the season with the largest temperature difference between day and night in a year. After entering the first first frost solar term, the cold air activities affecting our country became more and more frequent, and the temperature difference between day and night increased rapidly.

Especially in Jiangnan and South China, the temperature fluctuation is more and more obvious; Some areas in northwest and northeast China have shown the scene of "cold wind and fallen leaves" in early winter.

During the first frost period, it usually lasts from late June 10 to1early October 10. As dry and cold air gradually dominate the whole country, warm and humid air is marginalized, and many weather with characteristics of summer and early autumn exits, so the weather is relatively simple. Before and after beginning of winter, there were often strong winds and cool weather, and some places entered winter in a short time.