A volunteer of the upcoming fourth China International Import Expo (CIIE) waves their team flag during a swearing-in ceremony at the National Exhibition and Convention Center (Shanghai) in east China's Shanghai, Oct. 20, 2021. More than 4,700 people were sworn in as volunteers on Wednesday and started going about with their duties for the fourth CIIE scheduled from Nov. 5 to 10 in Shanghai, according to local authorities. Tens of thousands of volunteers have provided services since the first CIIE in 2018 to ensure the smooth running of the expo. (Xinhua/Liu Ying)
