Liyuan Guo is a first-year PhD student in theoretical physics at Sun Yat-sen University, working under the supervision of Professor Chengcheng Han. His research interests are in cosmology and fundamental physics, with a focus on dark matter, large-scale structure formation, and primordial black holes (PBHs). He has previously worked on topics related to the evolution of large-scale structures and dark matter phenomenology. Recently, he has been exploring PBH formation and their connection to early-universe physics. He has particularly interested in cosmic inflation and primordial perturbations, and how they can provide insights into the origin of structure in the universe.