Spring has passed half of the solar terms.

Half of the solar terms in spring are vernal equinox.

At this time, spring is already over half. "Spring" means spring, and "fen" means separation, which means that spring is over half. Spring has three months, that is, 90 days. Beginning of spring is the first day, and the vernal equinox is the 45th day, which happens to be the midpoint of 90 days in spring. On the vernal equinox, the sun shines directly at the equator of the earth, and the seasons in the northern and southern hemispheres are opposite. The northern hemisphere is the vernal equinox and the southern hemisphere is the autumnal equinox.

According to custom, farmers have a holiday on the vernal equinox. Every family should eat dumplings, and a dozen or thirty dumplings that don't contain hearts should be cooked and placed on the edge of outdoor fields with thin bamboo forks, which is called sticking sparrows' mouths so as not to destroy crops.