People visit the booth of 3M Company during the second China International Import Expo (CIIE) in Shanghai, east China, on Nov. 7, 2019. A total of 192 U.S. companies participated in the expo, an increase of 18 percent over last year. The floor space of U.S. exhibition area reached 47,500 square meters, taking up the largest exhibition area among all participating countries. (Xinhua/Fan Peishen)