Volunteers of the second China International Import Expo (CIIE) take oath during an oath-taking ceremony at the National Exhibition and Convention Center in Shanghai, east China, Oct. 19, 2019. Over 5,800 people were sworn in as volunteers and went on duty Saturday for the upcoming second China International Import Expo (CIIE), according to the Shanghai municipal committee of the Communist Youth League of China. (Xinhua/Liu Ying)