Gansu province in the context of "Gansu Wind Farm"

The Northern Silk Road is a historic inland trade route in Northwest China and Central Asia (historically known as the Western Regions), originating in the ancient Chinese capital of Chang'an (modern day Xi'an), westwards through the Hexi Corridor (in what is the modern Gansu province) into the Tarim Basin, going around north of the Taklamakan Desert along the two sides of the Tianshan Mountains, and then past the Pamir Mountains to reach the ancient kingdoms of Bactria, Sogdia, Kushan, Parthia and eventually the eastern provinces of the Roman Empire. It is the northernmost branch of the several Silk Roads providing trade, cultural exchanges and military mobilizations between China and the outside world.

The route was first developed by the Han dynasty in the latter part of the 1st century BC to secure diplomatic alliance against the Xiongnu confederacy, with whom China had been having escalating conflicts, and was progressively transformed into a major trade route during the subsequent dynasties to project Chinese influence towards the west.

The Hexi Corridor (/həˈʃiː/ hə-SHEE), also known as the Gansu Corridor, is an important historical region located in the modern western Gansu province of China. It refers to a narrow stretch of traversable and relatively arable plain west of the Yellow River's Ordos Loop (hence the name Hexi, meaning 'west of the river'), flanked between the much more elevated and inhospitable terrains of the Mongolian and Tibetan Plateaus.