If it has been published in a journal, neither the first unit nor other contents of the article can be revised. If some problems in the content of the article can be corrected by errata, they will not be changed in the original text, but corrected in the form of errata.

If all graduate students do this, good students will go to other universities to teach or further their studies after graduation, and the papers will be transferred to other institutions after being hired, which will be a great blow to the tutor (in extreme cases, the tutor has sent many papers by correspondence authors, but the assessment is 0, which is incompetent), and no one will be willing to guide graduate students or compete with graduate students for the first author of the papers.