On Jan. 14th, Prof. Gray from Yale University visited the CCME at PKU for academic report. During his visit, he was guided by Prof. Zhang to tour our lab and exhibition boards, and he also took group photos with us. Prof. Gray is currently a faculty member in the Department of Chemistry at Yale University and has long been dedicated to developing methods for efficiently utilizing solar energy to produce renewable fuels. We sincerely thank Prof. Gray for his visit!