The ancient buildings in China are mainly made of wood and bricks. Why is the tenon-mortise structure used to connect them so stable?

Most houses and appliances in ancient China were made of wood, but we can see that so many wooden houses and appliances can still be used normally after thousands of years, not even dangerous buildings. Why? I can only say that the invention of our ancestors is really amazing, because the joints of those wooden structures are tenon-mortise structures.

The tenon-mortise structure is a genius invention because it makes full use of the stress principle and lever principle in physics, and makes the tenon-mortise structure very stable through the simple superposition of several parts. Unless it is completely destroyed, it is impossible to disassemble the structure without a certain order.

So we can see that thousands of years ago, when we didn't have screws, how did we make wood and wood firmly locked together? Is it glue? What glue can be so stable after thousands of years? Only tenon-mortise structure, which is the essence accumulated by carpenters for thousands of years. This is the precious experience and wealth left by our ancestors.

Nowadays, in modern society, people have begun to re-understand the tenon-mortise structure. Many times, in some high-risk equipment, even if we are careful, we will still be defeated by some small screws. Many planes or aviation equipment can't fly normally. After the inspection, only a small screw is loose.

Therefore, in China's aviation field, tenon-mortise structure has been more and more used in various parts and fields. Through the unique and firm connection of tenon and mortise structure, many spacecraft flying into space can soar with confidence.