Wu Jinglian, Li Yining, Zhang and Zhang Shuguang in economics, Li Qiang and Li Yinhe in sociology, He Weifang, Feng Xiang and Ji Weidong in law, Wang Hui, Qin Hui, Qian Liqun, Xu Youyu, Lei and Gan Yang in literature, history and philosophy, and Liu Junning and Yu Keping in politics.

These people have profound academic background and professional training, can convey their independent and true opinions to the public from the standpoint of fairness and justice, have a strong spirit of criticizing reality, are highly praised by the public and the media, and occupy a majority share of the "opinion market".

Well-known extension materials usually have some professional knowledge, but they can't cover all fields. Judging and commenting on some news events is inevitably too dependent on intuition. On the other hand, because most famous people are relatively older, they receive education earlier, and their knowledge is relatively old, sometimes they can't keep up with the real development. Therefore, although celebrities are concerned about society, they will also make some unreliable suggestions from time to time.

In addition, many well-known academic institutions supported by the government, coupled with the limitations of age and vision, also make their criticism of some social phenomena insufficient in strength and depth.

Baidu Encyclopedia-Well-known (public intellectual)