What is the origin of spring?

In the process of the earth's rotation around the sun, according to the distance from the sun and the deflection angle of the earth's rotation, the earth's surface is alternately cold and hot, which leads to four seasons on the earth's surface, so spring appears. However, due to the deflection angle of the earth's rotation, different phenomena will appear on the earth in the same season.

As far as solar terms are concerned, spring begins in early spring and ends in long summer. Twenty-four solar terms are the product of ancient farming civilization in China, and the division of four seasons begins with "four stands". In the historical development, cultural exchange and communication, four solar terms (vernal equinox, autumnal equinox, summer solstice, winter solstice) reflecting the return movement of the direct point of the sun were all over the pre-Qin period.

The division of the four seasons in the west is based on the dichotomy, that is, spring is divided into beginning of spring. The vernal equinox in the "vernal equinox" is also the New Year of Uzbekistan, Turkey, Afghanistan, Iran and other countries, with a history of more than 3,000 years. In Ireland, February to April is designated as spring. In spring, the northern hemisphere of the earth began to tilt towards the sun, receiving more and more direct sunlight, so the temperature began to rise. In spring, plants begin to sprout and grow, and many flowers bloom. Hibernating animals wake up, many animals with eggs for the winter hatch, and birds begin to migrate, leaving the wintering ground for breeding grounds.