Generally speaking, the project participants or co-authors at the time of publication are basically ignored after the fifth place. However, since you are a sophomore, it is still worth encouraging. As for how to write in your resume, it is not difficult. In the column of academic achievements or learning trends, just write a paper you published in xxxx. Don't mention authors rank, because it's not good for you. If you need a specific format, then I suggest that you can refer to the following format to write: "High salary and honesty" is a misuse of Maslow's hierarchy of needs theory [J] Journal of Party and Government Cadres 20 12, (08). Co-author (this co-author is key and must be added)