Just as Angie Prairie had said, the method Chu Nan used was the high-frequency vibration Internal Breath that simulated the pulse resonance treatment. It was essentially similar to her Flame of Life that also stimulated the cell activity of the human body, enhancing the life force and accelerating the process of human self-healing to quickly recover.
In fact, even if most of the external injuries suffered by the human body were treated at the hospital, no matter how many variations the treatment methods were, in essence, it was only to rely on the human body's own recovery ability. There was not much difference.
However, because Chu Nan's high-frequency vibration Internal Breath simulated pulse resonance, it was equivalent to forcefully stimulating his cells and increasing their activity.