Drones have been used for the first time to help protect the Great Wall in Yanqing District, Beijing.
Aerial photo taken on Oct. 28, 2018 shows the autumn scenery of the Mutianyu Great Wall in Beijing,
capital of China [Credit: Xinhua/Chen Yehua]Local authorities have put various drones into service for different purposes, work previously done only by human inspectors.
A multi-rotor unmanned aerial vehicle (UAV) is being used to…
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