Nine Changes in Snake Movement

Who says that physical fitness must mean a strong body? If you train your body, you will definitely become a copper skin and an iron bone? After young prison guard Su Yang traveled through time, through countless coincidences, he developed a magical body-training technique. His skin was as slippery as a loach, yet extremely tough; his body bones were as soft as earthworms; his bloodline possessed the ability to infinitely pure evolution...