Copper Bars and Iron Bones

Is internal strength magical? Is external skill very simple? Is true energy really elusive? Do the martial arts that exist in legend really have no basis in reality? What is the relationship between inner qi and energy? How does external power use the principles of physics to generate force? Can biology find a fulcrum in the world of martial arts? Are the chemical reactions of the human body also involved in the process of martial arts performance? A military school student enters the world of martial arts, a world where history has been overturned. Can everything be answered? Please pay attention, "Copper Strength and Iron Bone" Thanks to the book friend for providing the group number: 141830272