The 20th National Youth Conference on Catalysis was held on May 10-14, 2024 in Dalian, Liaoning Province, China, sponsored by the Committee on Catalysis of the Chinese Chemical Society, organized by the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences (DICPAS), Sinopec Petrochemical Research Institute Limited (SINOPECRI) and co-sponsored by the National Key Laboratory of Catalytic Conversion of Energy. At the meeting, Dr. Xiaoyan Sun gave a presentation entitled "Cluster Catalyst Design and Reaction Mechanism Based on Mass Spectrometry".