Yangguan, also known as Yangguan Pass, is a mountain pass and historical outpost located in Northwest China. It is situated approximately 70 kilometres southwest of Dunhuang in the Gansu territory, to the west of Shaanxi province along the Hexi Corridor. In ancient times, this region served as the westernmost administrative center of China.
The site was fortified by Emperor Wu of the Western Han dynasty around 120 BC to serve as a frontier defense post in the colonial dominions adjacent to ancient China. During this period, Emperor Wu encouraged Chinese settlement in the area, developing it into a significant location on the remote western frontier. Today, Yangguan is located within Nanhu Village.