Visitors look at a drone system at the Geospatial Technology and Application Exhibition of the United Nations World Geospatial Information Congress 2018 (UNWGIC 2018) in Deqing County, east China's Zhejiang Province, Nov. 18, 2018. The exhibition shows cutting-edge technologies and applications of more than 200 world exhibitors in fields such as geospatial information, satellite navigation and aerospace remote-sensing. (Xinhua/Weng Xinyang)