In fact, it depends on the level of your paper. If it is SCI EI, etc., this third author is very useful. Many PhDs are difficult to get. In fact, this is generally used by teachers to evaluate professional titles. If you are a graduate student If it's for graduation, that's another story. (General school requirements are as follows)
1. Academic graduate students should be the first or second author and the first signature unit is XX University, in academic journals that are publicly released at home and abroad (or officially published) A degree can be awarded only after publishing more than 1 (including 1) relevant academic papers in the thesis collection, or providing more than 1 (including 1) research results (subject to scientific research results and patent certificates). Graduate students who cannot meet this requirement are not allowed to participate in the defense.
2. In-service professional degree graduate students should publish an academic paper with the first three authors.
3. Full-time professional degree graduate students are not required to have an academic paper for the time being.