Two competitors test their aircraft robot during the 2014 AUVSI International Aerial Robotics Competition (Asia-Pacific Venue) in Yantai, east China's Shandong Province, Aug. 4, 2014. The three-day competition is held in Yantai by the Association for Unmanned Vehicles System International (AUVSI) from Aug. 4 to 6. The event attracted more than 200 competitors from China, Spain, Singapore, India, Iran and Hong Kong. (Xinhua/Tang Ke)