Zhang Xiaoxiang and Sun Xin are contemporaries, and Ma Shibing is a few years behind him. The first two are famous for the crazy downloading of videos explaining the basic knowledge (java, vc++). The latter is the president of an organization, who almost explained the whole set of java from basics to ssh to projects, and later became famous for video leakage (or premeditated). At present, he has come from behind and become a java trainer as famous as Zhang and Sun. If you add Zhang Long in langxi, you are really a beggar in the training industry now. And their level and the novelty and popularity of the lecture content really rank first.

It's just a personal opinion, because I'm also a teacher in this field, and my popularity is equivalent to: (Lao Wang came in with 3000 brothers. . . One of the 3000 brothers)