There are also many migrant workers studying reading in the library. The more people at the bottom understand the importance of knowledge, what is not important to learn, what is important is to be really interested in learning. It won't be a bad thing to master more knowledge. He can do what most security guards can't do, and he will certainly become what most security guards can't do in the future. Therefore, each of us should always keep a positive heart and be a person who keeps learning and making progress. Only in this way can we adapt to and be competent for any social division of labor in the modern environment.