Introducing Mr. Lu Xun’s life experience when he broke through the feudal shackles, pursued new knowledge, left home to study, and then went abroad to study. It narrates that after the author's family declined, he suffered from the cold eyes of the world and finally embarked on the path of breaking away from feudalism. "Miscellaneous Notes" describes how Lu Xun went to Nanjing to study in search of "people of another kind". The work describes the various shortcomings and difficulties in seeking knowledge at the Jiangnan Naval School (later renamed Thunder School) and Mining Road School at that time, and criticizes the "smoky atmosphere" of the Westernization school. The author describes his excitement when he first came into contact with the theory of evolution and how he eagerly read "The Theory of Evolution" despite the objections of his elders, showing his strong desire to explore the truth.