The first step in entering the Second Realm: Tendon Refining was to first perceive the physical tendons within oneself before one could begin practicing.
In ordinary martial arts schools, recognizing the locations of the tendons was typically assisted by medicinal baths, using methods such as rubbing and slapping to identify them.
Then, one had to memorize the movements of the tendons, and through continuous hammering and experimentation, grasp the internal force techniques until every movement of the body gradually became instinctual.
Chapter 18