Blood Exchange!
Blood is the root of the Martial Body, the essential foundation of a living being's existence, and the key link between 'Qi' and 'Body'.
The Martial Arts body consists of flesh beneath the skin, tendons within the flesh, tendons surrounding the bones, and finally the five viscera and six organs. From the core of the Jade Marrow, only 'Blood' ties the entire body together, connecting the internal organs and bone marrow to the external skin, flesh, and fascia. This is the fundamental link that connects everything.
It can be said that the cultivation of Body Tempering Martial Arts, from outer layer to inner refinement, from skin toughening and body refining to the First Realm of Marrow Cleansing and the achievement of the Martial Body, is the process of building and perfecting each component, culminating in the stage of Blood Exchange to achieve full integration!
Before the Blood Exchange.