Applying the control over one's physical strength in the process of digesting food, even unleashing palm power to aid in eating.
This was something Zhang Yu had never done before in the past.
But relying on his terrifying techniques regarding physical strength, Zhang Yu mastered this quickly.
Initially, he needed to strike his abdomen with full force to stimulate the squeezing of the stomach and intestines.
Soon, his actions became more subtle, and the momentum of his palm strikes grew fainter.
This meant that he was becoming increasingly proficient in interfering with the digestive system through physical strength, with the flow and manipulation becoming more skillful.
In the end, Zhang Yu seemed to be gently patting his stomach, but the force caused his whole body to resonate repeatedly, producing low muffled sounds.