Not necessarily. Mainly depends on the contribution of the tutor in the paper. If the tutor has a certain contribution to the guidance of the thesis, you can sign a tutor. If the tutor's contribution is not great, you can thank the tutor at the bottom of the first page of the paper. For example, this article thanks xxx's tutor for his guidance, and I would like to express my gratitude here.

The ranking of SCI paper authors should be based on the actual contribution.

Generally speaking, the main author of an article should be a student, so it is more common that the final student is the first author and the teacher is the correspondent author. This should be the practice, but it does not rule out that the tutor must sign the first author like the first news.

Because students are the main body of teachers, many ideas in this paper are put forward by teachers, and the experimental funds and conditions are provided by teachers. Moreover, in the process of finalizing the paper, the teacher is also responsible for rewriting, especially the discussion of the results and conclusions, or checking the details, which all contain the teacher's painstaking efforts.

Moreover, for scientific research, thoughts, opinions and discussions are more important in the contribution of the article. Therefore, it is generally reasonable for a tutor to be a correspondent, and there is generally no dispute. It is suggested that newcomers take the initiative to sign the tutor as the exchange author. The average tutor will not be too embarrassed.