When he broke through to the third level of the Nine Revolutions Technique in the second level, Chu Nan had already tried to modify the cultivation method left behind by Su Xuansheng back then. In the end, he relied on his powerful data ability to find the most important method to increase his Internal Breath circulation and successfully broke through to the third level.
It was through that attempt that Chu Nan understood a principle.
No matter how powerful the cultivation method left behind by his predecessors was, it was not necessarily completely suitable for him.
The condition of the meridians in every martial artist was different. The increase in Internal Breath obtained from circulating the same Internal Breath cultivation method was naturally different.
This was the reason why different martial artists had different effects when cultivating the same cultivation method.