The King of Medicine Returns Home

When the protagonist went into the mountains to look for old things left by his grandfather, he was bitten by a rare medicinal stone fish near a medicinal spring deep in the mountains. After the wound was infected, he had a high fever and fell into a coma. When he woke up, he awakened to the "Secret Records of the King of Medicine" left by his grandfather - not a fantasy technique, but a complete knowledge system of herbal identification, ancient prescription preparation, trauma treatment, and dietary health care accumulated by generations of traveling doctors.