Office of the leading group for urban service and security of the second China International Import Expo, together with its 22 teams and a delegation from the China International Import Expo Bureau, holds a preparatory conference at the National Exhibition and Convention Center in Shanghai, Sept 19, 2019. This was the second comprehensive urban service and security drill to test the command system and all the work plans. [Photo/Xinhua]
Security staff members work at the command center of the onsite security for CIIE, Sept 19, 2019. [Photo/Xinhua]
Police officers guide passengers at the exit of the Metro Line 2 beside the National Exhibition and Convention Center, Sept 19, 2019. [Photo/Xinhua]
Police officers check real-time tracking videos at the security command center for CIIE, Sept 19, 2019. [Photo/Xinhua]
