Over 5,800 volunteers go on duty for second CIIE

A volunteer displays a four-leaf-clover-shaped button of the volunteers' uniform 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)