I Entered Taoism Through Medicine: Are You Accusing Me of Practicing Medicine Without a License?

(The rating just came out so it's a bit low) Su Xing, whose family was in ruins, found an ancient Chinese medicine book while sorting out his grandfather's belongings. From then on, he changed his life, cured diseases, and rejuvenated his life. However, as his understanding deepened, he gradually discovered that this ancient book seemed to be far more simple than just a medical book on the surface... Accidentally picking up a broken gourd, and a sage medical master from the era of cultivation emerged? The island that appeared out of thin air was actually rich in spiritual energy. When he went to explore, he accidentally opened the spiritual energy seal, causing the spiritual energy to revive. What kind of existence is the Onmyoji Guild of Japan? It seems to be planning a huge conspiracy.