I saw this set of illustrations back in February. They were so gorgeous, and I was really excited to learn that Yen Press had licensed it for the US. It's based on a Chinese play, Xixiang Ji, and originally released in France, which is probably the edition these scans are from.
I just got my copy from Amazon today...two weeks early (release date May 12th). It's quite beautiful - about 80 pages as a full color graphic novel, and 20 pages in the back just as illustrations. Guo Guo's first work, apparently.

I'm definitely going to go on a Guo Guo hunt this month.