How to make a wooden stool without nails is the way to insert it. I don't know. Long live understanding.

Ancient furniture in China was made of nails only, and tenon-mortise technology was adopted, and the method of concave-convex joint was adopted on two connected components. The protruding part is called tenon (or tenon); The concave part is called mortise (or mortise and tenon), which has reached a high technical level in traditional furniture in China, and now such technology is rare.