蒙古高原
Beijing, at the north tip of the North China Plain, is shielded by the intersection of the Taihang and Yan Mountains. Further north are the drier grasslands of the Inner Mongolian Plateau, traditionally home to pastoralists. To the south are agricultural regions, traditionally home to sedentary populations. The Great Wall of China was built in the mountains across the mountains that mark the southern edge of the Inner Mongolian Plateau. The Ming-era walls run over east to west from Shanhaiguan on the Bohai coast to the Hexi Corridor in Gansu.