What do the arrival of beginning of spring and the vernal equinox represent respectively?

On this day in beginning of spring, "the sun and thorns are in harmony, and everything is spring". After beginning of spring, everything is full of vitality, and all the seasons have begun.

Spring has begun in the northern hemisphere. Overwintering crops enter the spring growth stage.

First, the characteristics of beginning of spring:

After beginning of spring, the temperature rose, and most parts of the country began a busy spring ploughing season. Beginning of spring solar terms began, westerly jet, the southern branch of East Asia, began to weaken, and the winter climate was coming to an end. However, the intensity and location of the northern branch of westerly jet remain basically the same, the Mongolian cold high and Aleutian low are still relatively strong, and gale cooling is still the prevailing main weather.

However, during the intermission under the influence of strong cold air, the frequency of southerly winds increases, accompanied by an obvious warming process.

Second, the characteristics of the vernal equinox:

On the vernal equinox, the sun shines almost directly on the equator of the earth, and the whole world is almost as long as day and night. After the vernal equinox, the direct point of the sun began to enter the northern hemisphere, and the days became longer and the nights became shorter in all parts of the northern hemisphere. The vernal equinox is an important solar term, which is not only of astronomical significance: the northern and southern hemispheres divide the day and night equally.

Climatically, there are also obvious characteristics. During the spring equinox, China has entered a beautiful spring scenery except the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China. On the vast land, willows are green, Fei Ying grass grows, wheat jointing and rape blossoms are fragrant.