The ancient Silk Road originated in Xi'an, China and traversed through regions of China like Shanxi province and the Hexi Corridor before entering Central Asia and eventually ending in the Mediterranean. To protect caravans carrying silk and other goods, the Han government sent Zhang Qian on a diplomatic mission in the 2nd century BC to build relationships with tribes along the route. This helped establish the Silk Road as a safe trade network between China and the West. Centuries later, during the Tang Dynasty, Buddhist monk Xuanzang traveled westward on the Silk Road, helping spread cultural exchange. Trade along the Silk Road peaked under the Yuan Dynasty in the 13th century before eventually declining as sea trade rose.