First, Jiang Lang is exhausted, and there is no more topic. Since the lecture hall was opened, it can be said that from literature to history, from military to politics, from biology to economy, from ancient times to the future. From astronomy to geography, nine schools and three religions, all the things related to people and irrelevant have been said, and all the things that should not be said have been basically said, and there is nothing more good to say. Second, some scholars speculate on academics, making innovations in order to be unconventional, just to be famous. Most scholars&; opinions should be objective and to the point, but there are also many so-called scholars who deliberately make amazing remarks and come up with some different opinions in order to raise their social status, and feel that saying something that others have not said or dare not say is learned. Academic should be advocated, and there is no problem of principle in understanding culture with one&;s own subjective attitude. However, after a few so-called scholars made use of the lecture room to become famous, they came up with a set of views without principles and bottom lines, grandstanding and reversing black and white. It not only affects the image of scholars themselves, but also discredits the glorious image of the forum. Third, aesthetic fatigue and decreased attractiveness. At the beginning of the lecture, the novel model attracted the attention of many audiences, and with the printing of various magazines and books, the social popularity was extremely high, and the views in the lecture room became the source of many cultural people&;s “ations. However, with the development of the times, the audience has been watching a pattern for a long time, and it gradually becomes boring, and it is just like that. Moreover, in this fast-paced era, there is no patience to watch a drama episode by episode every day. Plus the main hot spots are all finished, and the rest are meaningless. Finally, with the gradual improvement of people&;s cultural quality, they have a stable world view of values. With the development of higher education and the long-term consolidation of basic education, people&;s cultural quality has improved year by year. More and more people have their own stable world outlook and values. Unlike in the past, they felt that everything they heard was reasonable, and everything they said in the lecture room was true. If what they said in the lecture room was different from what they thought, they would reflect on whether they were wrong. Now, more and more people will not correct their views on history, values, world outlook and family through lecture halls. In the words of some netizens, it can be summarized as follows: there are fewer and fewer people who are easily and casually indoctrinated.