Volunteers pose for a photo at the south square of the National Exhibition and Convention Center (Shanghai), the main venue for the second China International Import Expo (CIIE), in Shanghai, east China, Nov. 4, 2019. Over 6,300 volunteers are serving in various capacities at the second China International Import Expo (CIIE), 20% of whom also served at the first CIIE last year. (Xinhua/Cai Yang)