1. Sincerely explain to the tutor that there are serious plagiarism problems in the paper, and publication will have serious consequences and should be revised or withdrawn.
2. If the tutor insists on publishing, he can clearly put forward the plagiarized content in the paper, point out the consequences and express his refusal.
3. The tutor still insists on publishing, and can refuse to sign the paper and report this fact to the relevant institutions. Although this will have a certain impact on tutors and research groups, it can avoid serious academic misconduct. And take remedial measures afterwards, such as rewriting papers and apologizing statements to save the situation.