So the artists in the collaboration are listed in post #7496315 and post #7496316

Looking into it further the commissioner?/poster, anamnesis123 also posted these on Weibo with each stage as a separately posted illustration: https://weibo.com/7617986022/O6OPDEMzh

Given the names involved, the poster's identity, and the fact that this was on Weibo, all the artists are presumably Chinese, and it doesn't appear that we have any of them in our system currently at least by these names. Perhaps someone better with Weibo / Chinese could look into these artists and get them added. Unfortunately it doesn't appear that there is any direct link to them, and the names may potentially be ambiguous (Plum certainly is).