Design principle of arch bridge

The arch bridge invented by China people is not supported by rigid steel bars, but is completely arranged by dense stones. However, on the arch bridge, you can pass through thousands of years of chariots, horses and pedestrians without falling down. This powerful supporting force is formed by the perfection of the internal structure of the arch bridge, and not every stone tries its best to support the weight of the horses and chariots.

If we stick the rattan to the ground and then apply pressure to the other end of the rattan with our hands, the strong elastic force generated inside the rattan is the internal force of the rattan. It should be noted that when we do not press the rattan, the rattan is completely relaxed, and the rattan does not support the outside world at any time; When we do not oppress the arch bridge, the arch bridge is completely relaxed, and the arch bridge does not give support to the outside world at any time. Practitioners must thoroughly understand that the internal strength is the complete relaxation of the internal structure of the body, which is formed by external force extrusion, rather than the muscles bulging at any time. Therefore, the strength generated by muscle movement is not internal strength.

The fighters of "Cheng Pai Gao Ba Gua Zhang rubs his body and hands in a chain" are also the same when using internal strength. When his body is not squeezed by external force, his body just naturally maintains a loose and perfect structure, and then the fighter's body is completely relaxed. Only when the soldier's body is squeezed by external force can the powerful internal force formed by the internal structure be reflected on the enemy. Therefore, the weaker the extrusion of external force, the smaller the internal force formed; The stronger the external extrusion, the greater the internal force. This is also why the stronger the attack power of Mushadekoro, the more powerful the enemy will rebound.