Tell me about the hero in Diary of a Madman.

A madman is actually an awakened intellectual image who dares to challenge the tradition, and a symbol image of a sober anti-feudal Democrat who dares to challenge the realistic secular society. The madman, a "persecution delusion" mental patient with the characteristics of fear, paranoia, perceptual disorder and imperfect logical thinking, is vividly described, but the main purpose of the work is not to show his spiritual persecution, let alone a documentary work of mental patients, but to expose the nature of feudal ethics and cannibalism through the mouth of a madman. The image of a madman has the duality of "madness" and "not madness" On the one hand, the madness of a madman lies in his characteristics as a mental patient, on the other hand, in his resistance to tradition and secularism; The madman's "not crazy" lies in his "advanced" ideological understanding, saying what people dared not say or thought at that time. Just as anyone who resists tradition and the existing social order in history is regarded as a "madman" without exception, the madman's thinking and language are often deviant, but his observations and conclusions are rich and profound. Although the work is Diary of a Madman, it always revolves around the phenomenon of cannibalism that has existed in China for thousands of years. Its intention is to tell everyone that in the history of "benevolence, righteousness and morality", in fact, the whole book only wrote two words: "cannibalism"! This is Lu Xun's definition of feudal morality and the result of his years of thinking. Through the eyes of the protagonist's madman, the work observes the people around him: "They-some slapped the magistrate, some slapped the gentleman, some occupied their wives for the sake of the chieftain, and some were forced to death by creditors." However, instead of fighting against cannibalism, they will follow suit. The madman is puzzled by this, and the author is very angry about it: "It has been used like this all the time. Are you right?" Or did you lose your conscience and knowingly commit a crime? "In the eyes of lunatics or authors, these people will eventually be eaten if they don't change, and the hope for the future can only be pinned on those' or children who don't eat people'. So, he uttered the voice of "Help the children ...".