First, buy a nourishing medicinal material in a Chinese pharmacy, and then add water to boil it. Let the cooked soup cool and then cook it like an egg. When it is cool, add the eggs and a little salt. Turn off the fire after boiling, cover the pot and stew for about 5-6 minutes, then take it out and cool it in water. Then peel off the shell, soak it in boiled and cooled medicinal soup and put it in the refrigerator. It will taste in about 2-3 days. Take it out and heat it at room temperature, or eat it directly without heating it, or the yolk will be cooked. When you want to cut, you can hold the thread, bite it with your mouth at one end, hold it directly with your hand at the other end, and cut the egg directly with the other hand, so that it can be cut beautifully and the yolk will not stick to the knife because it is cut with a knife.
But you can omit the last step if you have cut yours.
I hope it helps you.