Yang Yuanyuan, deputy director of the State Administration of Work Safety, and domestic and foreign experts inspected the safety valley (national incubator) of Xuzhou High-tech Zone and inspected the fire-fighting UAV system of our company. Deputy Director Yang Yuanyuan and experts at home and abroad listened carefully to Dr. Zhang. The professional introduction of man-machine, Director Yang and the experts present gave a high evaluation, and put forward constructive opinions on its wide application in the future.。