When a doctor finishes his work in a research mobile station or a research workstation for a certain period of time, he is called a postdoctoral fellow. In addition, people who apply for postdoctoral research need to provide a lot of materials, such as postdoctoral application forms. Letter of recommendation from experts; Copy of ID card; Copy of doctoral degree certificate or resolution of doctoral thesis defense Committee, etc. A doctor who has worked in a research mobile station, research workstation and other places for one year and left the station is called a postdoctoral. Postdoctoral students are generally researchers in postdoctoral mobile stations or postdoctoral research centers, but postdoctoral students are not degrees, which means' a period of work experience'. There are many conditions for setting up a postdoctoral research center, such as having a national enterprise technology center or a sound research and development institution, a high-level scientific and technological personnel team and a high-level scientific research project; Having strong economic and technical strength and attaching importance to talent work can provide better scientific research conditions and necessary living conditions for postdoctoral researchers.