Majority (but not all) of the works uploaded with artist tag of xingzhi_lv have a commentary of "第[]期学生作品", which mean "Works of student{s} from cohort #[]". Which indicate these works posted onto their pixiv account aren't works by the artist who hold the pixiv account themselves, but rather works by their students. In this case I don't think it is appropriate to credit the pixiv user as the artist of all these works. Some of this type of works have watermarks, probably indicating water appears to be original creator's name, but not all of this type of works uploaded feature such watermark. There are also some commentaries which said things like "给群里学生改了张图", aka "I have touched up this illustration for student in my instant message group", which indicate the artist isn't the main author of such work either.
How should the artist tagging of these illustrations be fixed? It is rather likely that we will never know who actually draw all these illustrations. And in this case, should a pool or something similar be created to reflect their shared nature of being courseworks from students submitted to this same artist?