Vivian Hsu's latest third-level advertising photos with low-cut chests and beautiful legs are mesmerizing. (Note: The term "third-level" in this context may refer to a rating or category, but it could be misleading or inappropriate in English. If you mean something else by "third-level," please clarify so I can provide a more accurate translation.) A more appropriate and polished version might be: Vivian Hsu's latest advertising photos showcase her stunning beauty with elegant low-cut outfits and glamorous leg shots.