Uncle Kang played an important role in Lu Xun's Medicine. In the novel, he was portrayed as a compassionate and righteous person, as well as a doctor who was deeply trusted and relied on by his patients. Uncle Kang's image had a distinct personality. He was kind, upright, and responsible. He treated patients very seriously and did his best to treat them. He did not want to see the patient in pain and even sacrifice his life to save a patient in danger. In the novel, Uncle Kang's life was destroyed by a conspiracy, but he did not become cold and selfish because of it. On the contrary, he showed the warmth and care of humanity at the edge of losing his life, making people more aware of the fragility and value of life. Uncle Kang's image was an important theme in the novel. He represented the beauty and justice in human nature, making people cherish and respect life more.