Shanghai's convention and exhibition industry is "hot" again. This morning, the National Convention and Exhibition Center ushered in the first exhibition of this year-CME China Machine Tool Exhibition, the three exhibitions of the World Expo Exhibition Hall opened at the same time, China International Organic Products Expo, Shanghai International Craft Beer Exhibition and Shanghai International Medical Protective Equipment Exhibition Held. Measuring body temperature, presenting the registration code and real-name registration are all necessary to enter the "Trilogy" of the museum. Wearing masks throughout the course and restricting real-time flow of people are also the "new normal" during the prevention and control of the epidemic.