When did the solar terms in beginning of spring originate?

Beginning of spring is one of the important traditional festivals of the Han nationality. "Li" means "start". Since the Qin Dynasty, China has always regarded beginning of spring as the beginning of spring. Beginning of spring is divided from astronomy, with spring flowers and flowers; Spring is growth, cultivation and sowing. The period from the beginning of the Spring Festival to the long summer is called spring. Beginning of spring is not only the first of the 24 solar terms, but also an important festival. Astronomically speaking, it marks the beginning of spring. This year's beginning of spring solar term begins on February 4th and ends on February 18. The understanding of beginning of spring is explained in the ancient book Qunfangpu: "Li, Jian also. Spring began and was established. "

During the early spring, the temperature, sunshine and rainfall began to rise and increase. But all this is just a prelude to spring in most parts of the country, and the prelude to spring has not really begun. Since the Qin Dynasty, China has always regarded beginning of spring as the beginning of spring. Beginning of spring is divided from astronomy, but in nature and people's minds, spring is warm and flowers are fragrant. Spring is growth, cultivation and sowing. In climatology, spring refers to the period when the average temperature is between 10℃ and 22℃. Speaking of beginning of spring, people obviously feel that the days are getting longer and the sun is getting warmer.

Temperature, sunshine and rainfall are often at the turning point of the year and tend to rise or increase. The growth of crops in early spring is accelerated, and the water consumption for bolting rape and jointing wheat is increased. Irrigation and topdressing should be done in time to promote growth. Agricultural proverbs remind people that "it rains in early spring, get up early and go to bed late", and Da Chun has also begun to prepare for agriculture. Although it is spring, most parts of South China are still very cold. "Snow is too late for spring, so it flies over the trees in the courtyard." These climatic characteristics should be taken into account when arranging agricultural production.

After beginning of spring, due to the rising sun's spirit, the revival of everything, the thawing of the earth, the rising temperature and other factors, the night exudes a sweet and fresh breath, replacing the smell of dust and fallen leaves in autumn and winter.