To put it bluntly, the cultivation of cultivators was a process of stimulating the human body's potential, so that the human body's potential could be developed and utilized to the maximum. Therefore, any cultivator could be said to be an expert in the study of human body. Even if they didn't understand other people's bodies, they definitely understood their own bodies. This was the case for the cultivators at the early and basic body training stage.
Cultivators at the body tempering stage mainly cultivated their bodies. They had to cultivate their bodies to a certain degree before they could start to cultivate Qi.
