Because the competition for postdoctoral positions is fierce, even if they are successfully hired, they may cause additional pressure because the work content of postdoctoral doctors has nothing to do with their own interests. For example, some enterprises may take advantage of the post-doctoral research positions established by their research institutions, which may be stressful and attach importance to the application results.

Although the instruments and research environment may be quite satisfactory, the results of research projects that are too mechanized and standardized make some people who are interested in innovative research and development feel uncomfortable.

Even because postdocs are temporary employees, institutions will choose to restrict such people's access to information, or set many restrictions and requirements on their work projects. These are all issues that must be considered when choosing a postdoctoral position.

Be sure to carefully select the substantive research content of the postdoctoral project, who are the main scholars involved in the research, who will be your co-tutor, whether you will produce important research results because of participating in postdoctoral research, or make real progress in research experience and research vision.

In China, getting a doctorate is a necessary condition for becoming a postdoctoral fellow, but there are also some researchers abroad who do not have a doctorate, but they are postdoctoral fellows, so postdoctoral fellows have scientific research experience.

The post-doctoral term is generally not long, which is considered as a transitional arrangement for scientific research. The national postdoctoral fund supports postdoctoral students for two years. Foreign universities generally have no unified arrangement for postdoctoral students, and the source of funds and the length of time are relatively flexible.