Visitors look at the unmanned aerial vehicles (UAV) displayed during a demonstration event of the UAV achievements in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Oct. 23, 2012. Nineteen UAVs were demonstrated during the event kicked off on Monday. The UAV technology has been applied to investigate the condition of agriculture, forestry, land resources, and water resources in Ningxia. (Xinhua/Wang Peng)
