How can I make an egg stand upright?

If you make an egg out of even wood. Cut the wooden egg horizontally, and the cross section is round. A thin circular piece of paper whose center of gravity is the center of the circle. So as far as the whole wooden egg is concerned, the center of gravity must be on the connecting line between the two tops. When the wooden egg is cut vertically, one end of the cross section is large and the other end is small, so the center of gravity is not at the center of the connecting line between the two tops, but at the big end. The wooden egg is lying on the table, and its bottom surface is the point where it touches the table. Because the bottom is too small, it will roll with a light touch.

If you put a wooden egg on the table, straighten it, with both ends facing down, as long as the connection line between its two tops is just perpendicular to the table, won't it stand upright on the table and not fall off? But at this time, the center of gravity is a little higher than when you lie on your back, so it is more unstable and you will fall when you touch it. In other words, even wooden eggs are hard to stand upright.

Real eggs are not made of wood. It contains protein and egg yolk, which is lighter than protein. Scientifically speaking, the density of egg yolk is less than that of protein, so no matter how you toss the egg, the egg yolk is always slightly higher. The center of gravity of the egg therefore roughly moves slightly downward.

The center of gravity hanging below the head is what we infer from Muyi Egg. Let's straighten the eggs on the table. If the line between its two tops is just perpendicular to the table, and its center of gravity is just at rest on this line, if we let go, the egg will definitely stand upright. Such a combination is certainly more difficult to achieve.

Difficult is difficult, not impossible. People who think that eggs can't stand upright under any circumstances are wrong. They judge without thinking, and they can't get the truth. People who think that eggs can stand upright only on that day in beginning of spring are also wrong. They don't think, they follow the crowd, and they can't get the truth.

Whoever has patience can stand the egg upright. Be careful, the eggs will stand up in less than 10 minutes. People who don't believe can test it with their own hands at once. Anyone who doesn't stand up straight can only blame himself for not being careful and patient.