Volunteers seen on street in host city of 18th SCO Qingdao Summit

Three volunteers stand on duty in Qingdao, east China's Shandong Province, June 3, 2018. The 18th Shanghai Cooperation Organization (SCO) Summit is scheduled for June 9-10 in Qingdao. Volunteers are easily seen on the street. (Xinhua/Li Ziheng)