The custom of solar terms in beginning of spring still exists.

Vertical egg is to take an egg and stand it on a horizontal surface.

The vernal equinox vertical eggs mainly have the following two principles:

1. On the vernal equinox, the northern and southern hemispheres are divided equally day and night. The earth's axis is inclined at 66.5 degrees, which is in a relatively balanced state with the earth's orbital plane around the sun, and the earth's magnetic field is also relatively balanced, so the egg stands best.

Second, the vernal equinox is in the middle of spring. Lukewarm, comfortable, quick-thinking, quick-witted, and easy to succeed. When the vernal equinox comes, eggs are beautiful. The most fun thing on the vernal equinox day is to erect eggs.