Ecns: Drones increasingly used to protect Great Wall

Ecns: Drones increasingly used to protect Great Wall. “The use of drones helps human inspectors gain a precise understanding of the preservation of the Great Wall at delicate levels and reveals more information on areas difficult for people to access. Yanqing has the most extensive Great Wall elements in the capital city as well as a complete preservation system. Authorities said drones, satellite images and other new technologies will provide the most comprehensive, accurate data on the Great Wall to create a digital archive platform.”