Medicine was a long novel by Lu Xun, which mainly described the current situation of medicine in Chinese society at the end of the Qing Dynasty and the fate of a group of doctors. The following are the personalities of some of the main characters in the novel: Fang Hongjian: A young man from a medical family with a strong thirst for knowledge and a passion for the medical profession. He was smart, studious, compassionate and righteous, but he was also bound and restricted by feudal ideas. Old Doctor: Fang Hongjian's first teacher was an old doctor with rich experience and deep medical knowledge. He was an upright person who paid attention to medical ethics and had deep feelings for his patients. Mother Fang: Fang Hongjian's mother was a kind and shrewd woman who encouraged her son to pursue a medical career for the sake of his son's future. Pharmacist: A scientist who is full of innovative spirit and scientific research spirit, dedicated to the research and development of new drugs. Although he was a loner, he had a high academic level and keen insight. 5. Wang Yaoqin: Fang Hongjian's lover is a strong and independent girl who also has a strong interest in the medical career. She and Fang Hongjian had deep feelings and mutual understanding. 6. Little Phoenix Goddess: A beautiful woman with a twisted heart who uses her beauty and status to obtain money and power. At the same time, she also has certain moral problems. These are some of the main characters in the novel. Their personalities and fates form a vivid picture of society, reflecting the various ills and distortions of human nature in the late Qing Dynasty.