On Mar. 17th, Associate Prof. Wei Liu from the Department of Chemistry at the University of Cincinnati, USA, was invited to visit the CCRE at PKU for an academic exchange. During his visit, he toured the laboratory under the guidance of Prof. Zhang and took a group photo with us. Associate Prof. Wei Liu is currently engaged in research on organic methodology, transition metal catalysis, organometallic chemistry, radical chemistry, radiolabeling, and organofluorine chemistry. We sincerely thank Associate Prof. Wei Liu for his visit!