Moderate rain to heavy rain and severe cold solar terms

From 10 to 14, it rained heavily for five days, and it was so cold that it cried after Qingming. As the agricultural proverb goes: clear sky snow, Grain Rain frost.

It snows continuously in Tomb-Sweeping Day: During the period before and after Tomb-Sweeping Day, the temperature difference between day and night is very large, and the temperature rises rapidly, but it also drops rapidly. Moreover, the temperature fluctuates obviously back and forth, and often there will be sudden snowfall at this time, which will do great harm to crops.

Frost never stops in first frost in Grain Rain: During this period in Grain Rain, the temperature rises, which is suitable for planting fruits and vegetables. Moreover, after planting, the temperature is relatively high, and vegetables grow quickly. The phrase "there is constant frost in Grain Rain" means that there is basically no frost in the night before and after Grain Rain, and there will be some frost occasionally in the evening, so when planting vegetables in the countryside before and after Grain Rain, the newly unearthed seedlings should be covered with grass at night.

Related contents of the twenty-four solar terms:

Twenty-four solar terms are special festivals in the calendar to express the change of natural rhythm and establish "December architecture", which contains a long cultural connotation and historical accumulation and is an important part of the long history and culture of the Chinese nation. Twenty-four solar terms are not only the seasonal system that guides agricultural production, but also the folk system that contains rich folk customs.

"Twenty-four solar terms" is the product of ancient farming civilization. It is a knowledge system formed by ancient ancestors following the farming season and observing the movement of celestial bodies to understand the changing laws of seasons, climate and phenology in a year. The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates in cycles, and bucket handle rotates clockwise once. The current "24 solar terms" are based on the return of the sun on the ecliptic. ?