The China International Big Data Industry Expo was co-hosted by the National Development and Reform Commission and the Guizhou provincial government, and was attended by leaders of many countries, as well as representatives of the and the United States. March 2017, our low-altitude defense system on the number of Expo site for a four-day low-altitude security. Our low-altitude intrusion detection and protection system for the first time with the city's monitoring system to achieve technical integration, the scene by the command unified monitoring command, during the successful landing of 3 black flying uavs.