What is the name of the western terminus of the Ming Great Wall?

The western terminus of the Ming Great Wall is Jiayuguan, also called Jiayu Pass.

Jiayuguan stands in Gansu province at the western end of the Ming-era defensive system, near the narrowest part of the Hexi Corridor. Its position beside an oasis made it a strategically important gateway between China and the deserts and trade routes leading toward Central Asia.

The fortress was constructed during the early Ming dynasty, around 1372, and was later strengthened because of fears of invasion. It formed three defensive lines: an inner fort, an outer fort and a moat. The walls connected with the surrounding mountains and helped control movement through the corridor.

Jiayuguan was also a major Silk Road waypoint. Merchants and envoys travelling from Central and West Asia commonly entered Ming China through the pass. It is sometimes confused with Shanhai Pass, the traditional eastern end of the Great Wall, or with Juyong Pass near Beijing. Jiayuguan’s name refers to the pass and the nearby city, Jiayuguan.