Jin was located in the lower Fen River drainage basin on the Shanxi plateau. To the north were the Xirong and Beidi peoples. To the west were the Lüliang Mountains and then the Loess Plateau of northern Shaanxi. To the southwest the Fen River turns west to join the south-flowing part of the Yellow River which soon leads to the Guanzhong, an area of the Wei River Valley that was the heartland of the Western Zhou and later of the Qin. To the south are the Zhongtiao Mountains and then the east-west valley of the Yellow River which was the main route to the Wei Valley to the west. To the east were the Taihang Mountains and then the North China Plain. This location gave ambitious Jin dukes the opportunity to move north to conquer and absorb the Xirong tribes, move southwest and fight Qin, and move southeast to absorb the many smaller Zhou states.