What effect does the first frost have on plant growth?

First frost, at this time, the first frost generally appears in the Yellow River basin, and most areas are busy planting crops such as three wheat. Health care is particularly important in the first frost season. There is a folk proverb that "it is better to make up the first frost once a year", which shows the influence of this solar term on people. For plants that are not cold-tolerant, "the first frost kills a hundred herbs", and plants that are severely frosted have no vitality at all. This is because the liquid in plants forms ice crystals due to frost, protein precipitates, and the water in cells extravasates, which makes the protoplasm seriously dehydrated and deteriorated. For the fruits matured in the first frost, the fruits after frost will be sweeter and more delicious. In a word, frost has both advantages and disadvantages for plants, so it should be treated differently.