The whole text of "Trivia Notes" is really "trivia notes" but not "trivia". Can you tell me why?

After describing the decline of the author's family background, "Miscellaneous Notes" suffered from the cold eyes of the world and finally embarked on the road of renouncing feudalism. "Miscellaneous Notes" recounted the process of Lu Xun's going to Nanjing to study in search of "another kind of people". The works described all kinds of disadvantages and difficulties in seeking knowledge of Jiangnan Navy School (later renamed Thunder and Lightning School) and Mining Railway School at that time. Criticized the "cigar smoke" of the Westernization School. The author described the excitement of initial contact with the theory of evolution and the eagerness to read The Theory of Evolution despite the opposition of the older generation, showing a strong desire to explore the truth.

In this paper, YanTaitai in Lu Xun's works often encourages children to do bad things, and then acts as a "good guy" afterwards. For example, she encourages children to eat water tanks in winter. She also encouraged the children to "spin" in the competition, and counted from the side and said, "OK, eighty-two! One more spin, 83! Ok, 84! ..... "But when she saw the child's adult coming out, she immediately changed her tone and said," You see, didn't she fall down? Don't listen to me. I told you not to spin, not to spin ... "