![Drone sprays insecticide over wheat field in N China(2/4)](http://www.ecns.cn/hd/2015/05/20/74163f09b25a493a80e8c825ddf930bc.jpg)
A drone flies over a wheat field to spray insecticide at Wenjiazhuang Village in Shijiazhuang, north China's Hebei Province, May 19, 2015. One insecticide spraying drones can cover 15 to 20 hectares of wheat field in eight hours, significantly saving costs compared with traditional methods. (PPhoto: Xinhua/Wang Xiao)