Author Contributions: Conceptualization, H.Z.; methodology, H.Z. and X.L.; software, L.L. and Y.S.; validation, H.Z., L.L. and X.L.; formal analysis, H.Z. and X.L.; investigation, H.Z., L.L. and X.L.; resources, H.Z. and Y.S.; data curation, H.Z.; writing—original draft preparation, H.Z. and L.L.; writing—review and editing, H.Z.; visualization, H.Z. and Y.S.; supervision, H.Z.; project administration, Y.S.; funding acquisition, L.L. All authors have read and agreed to the published version of the manuscript.

Funding: This research was funded by National Social Science Found Education Youth Project (Project: A study on the current situation, influencing mechanisms, and improvement strategies of the quality of postgraduate student training in basic disciplines) grant number CIA230320.

Institutional Review Board Statement: Ethical review and approval were waived for this study as we did not collect any information that could identify the participants during the data collection process. Therefore, according to the ethical review regulations, such research does not require ethical review.

Informed Consent Statement: Informed consent was obtained from all subjects involved in the study.

Data Availability Statement: The data that support the findings of this study will be made available from the authors upon reasonable request.

Conflicts of Interest: The authors declare no conflicts of interest.

Appendix A

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 Reprinted from MDPI