No, but you need to take a written test and an interview. The book system belongs to public institutions, and the treatment is similar to that of civil servants. The content of the written test is basically the same as that of the civil service registration and public ability test. In addition, although the income of the library is not high and the work is rather boring (those who know Chinese prefer reading, but staying in the stacks all their lives is another matter), there are many people who want to go in now because their work is relatively stable and they don't need professional skills. If you don't have a hard relationship and just want to go to the book system, I advise you to give up. You can be a clerk, assistant or teacher in an enterprise (you can't get into the head office of a university middle school).