Large sections of the Great Wall of China are in urgent need of preservation work, but hard to reach.
So drones are coming to the rescue.
Please subscribe HERE [ Ссылка ]
![](https://i.ytimg.com/vi/6ajDVn8g2RY/mqdefault.jpg)
Large sections of the Great Wall of China are in urgent need of preservation work, but hard to reach.
So drones are coming to the rescue.
Please subscribe HERE [ Ссылка ]