Ph.D. in related fields and published research papers. Postdoctoral students in the Seventh Hospital of Sun Yat-sen must reach the time limit stipulated by the state and complete the goals and tasks stipulated in the work contract during their stay in the station. The exit conditions include having obtained or about to obtain a doctorate in materials science, biomedical engineering, biomedicine, chemical physics, electronics and other related majors, publishing research papers in academic journals in related fields as the first author, and passing the exit examination. The Seventh Affiliated Hospital of Sun Yat-sen University is located in Guangming District, Shenzhen. It is a third-class first-class hospital invested and constructed by Shenzhen Municipal Government and operated by Sun Yat-sen University.