Invincible: from a Sick Man to a Saint

Once he traveled through time, he became a sick man in the eyes of the world. In this world, martial arts rule the roost, but Li Dange has difficulty making achievements in martial arts. He is a sick young man born with a weak constitution, and practicing martial arts means seeking death. And his family background is also quite complicated. Although he is the prince of the country, he has a half-brother staring at him eagerly, and it is difficult to support him as a second generation ancestor for the rest of his life. What should I do? Fortunately, if you can't practice martial arts, you can practice Qi. Although Qi training has been extinct since ancient times in this world. But Li Dange discovered a BUG. Ancient Qi training mainly promoted the method of visualization. After the Jedi Heavenly Power, all visualization methods were abolished, and visualization cannot be retained in the mind. Li Dange took a different approach and engraved his thoughts on his body... If I can't visualize it, if I just imprint it on myself and realize it, that's the end of it? Then... I'm invincible