Why do so many people slander Professor Ceng Shiqiang?

The main reasons why many people vilify Professor Ceng Shiqiang include the following aspects.

First of all, some people think that a lot of knowledge taught by Professor Ceng Shiqiang is out of date, and most of it is foreign theories and things, which are not in line with China's national conditions at all, nor with the actual situation of many local enterprises, so they take it out to teach and let many enterprises use it. Shouldn't it be vilified?

Secondly, the detractors of Professor Ceng Shiqiang think that he is not a professor at all, but a "big bluff" with a set of theories but little practice. Such people are fake. After all, without practice, there is no right to speak. Many things need practice to prove whether they are feasible or not, and whether they have strong practical experience to convince everyone.

Of course, there are still some people who vilify Professor Ceng Shiqiang out of envy, jealousy and hatred. Some people just don't like the success of others, don't like the incomparable glory of others in front of others, get so much support and praise, and get so much training fees and labor fees. There are also many people who are born jealous.