On September 28, the first frost this year, there was a saying: "The first frost is frost-free, and there is a shortage everywhere." What does this mean?

The first frost has frost before the solar term, which means that the cold weather comes early. At this time, it is the harvest season of autumn harvest crops, and it is also the time for late rice heading and flowering, which is easy to cause famine. Similarly, if there is no frost after the first frost solar terms, it means that the cold comes late and it is still not good.

The first frost solar term is the beginning that the cold is stronger than the golden gas. Before the first frost, golden gas was still stronger than cold. At this time, although the dew is cold, it can't reach the power of condensation into frost. After the first frost, the cold is stronger than the golden gas, the temperature drops completely at night, the dew freezes into small ice crystals, and "first frost" appears.

Characteristics of first frost

In the first frost season, the yang sinks into the ground and the yin condenses on the surface. The gold gas in autumn gradually weakens, and the water vapor in winter gradually increases. Until the solar terms in beginning of winter, the gold gas was exhausted, the winter water was abundant, and the cold winter came.

Autumn and full moon, from the beginning of the cold dew solar terms to the end of the day before beginning of winter, the first frost is right in the middle. Before the first frost, the gold gas gradually collected and the winter water germinated and grew. At the first frost, the golden gas and water vapor basically reach a balance. After the first frost, the winter water is getting thicker and the gold gas is getting weaker. After beginning of winter, the water in winter became the master of the season.