The Gansu section of the world's first 1,100 KV ultra-high-voltage direct current transmission link was fully connected last Friday in Shandan County, northwest China's Gansu Province. It stretches for 1,279.6 kilometers and is connected by 2,289 transmission towers. The project sets a new world record in terms of voltage level, transmission capacity, and distance. It is expected to be put into operation by the end of 2018.