On June 18-20, 2021, the Chinese Economists Society (CES) held its annual conference online, titled as Public Policy and Economic Behavior: China and the World amidst a Global Pandemic. After the opening ceremony on June 18, there economists delivered keynote speech: Colin Camerer, the Robert Kirby Professor of Behavioral Economics at California Institute of Technology; David Cutler, the Otto Eckstein Professor of Applied Economics at Harvard University; and Gordon G. Liu, the PKU BOYA Distinguished Professor of Economics at Peking University. Prof. Liu gave a talk on “What can we learn from the Pandemic interventions”, followed with roundtable discussions with David Cutler and the participants.