A drone was used to lift a high-voltage wire in Yuncheng, a city in north China's Shanxi Province. One end of the wire was already fixed to a transmission tower. The drone's mission was to bring the other end to a separate tower, located in Sanmenxia City, Henan Province. The drone flew about 1 kilometer across the Yellow River to complete the task. The job was part of a larger project connecting power lines between the provinces of Shaanxi and Hubei.