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. [Photo/Xinhua]
A volunteer guides the pedestrians at a road in Qingdao, East China's Shandong province, June 2, 2018. [Photo/Xinhua]
