Shake the raw egg vigorously, put the big head down on the table, straighten your hands, let it stand for a while and let it go. The egg stands upright on the table.
Take a boiled egg, hold the top of the egg with your thumb, forefinger and middle finger, put it on the table, and turn it hard. The boiled egg will turn and stand up.
Every year on the vernal equinox, tens of millions of people all over the world are doing the experiment of "standing eggs", which is the so-called "custom" Why it is a "world game" is still difficult to verify, but its play is really simple, relaxed and interesting: choose a smooth and symmetrical fresh egg that has just been born for four or five days and gently put it on the table. There are many losers, but many of them have become the best time to lay vertical eggs at the vernal equinox, so there is a saying that the vernal equinox is the best time to lay vertical eggs.
The vernal equinox is a day with the same length of day and night in the northern hemisphere and the southern hemisphere. The inclination of the earth's axis is 66.5 degrees, which is in a relatively balanced state with the earth's orbital plane around the sun, which is beneficial to vertical eggs. Secondly, the vernal equinox is in the middle of spring, which is lukewarm, colorful, comfortable, quick-thinking, agile and easy to succeed in laying eggs.
The well-proportioned and smooth curve of an egg is difficult to erect. Its charm lies in the fact that Leonardo da Vinci, a famous European Renaissance painter, practiced drawing egg curves every day for more than two years, which laid a solid foundation for later shaping the mysterious smile of Mona Lisa. China folks call face "face", and take the beauty of egg-shaped face as the standard to explain China's superb aesthetic appreciation and egg-shaped aesthetic attributes. For a long time, people have been looking for the mathematical expression of egg-shaped curve, and even mathematicians can only approximate egg-shaped curve with rulers and compasses. No wonder thousands of egg-shaped painters have painted them.