Great Wall of China
Other functions of the Great Wall included border control, enabling the ruling dynasty to ration or tax goods transported along the Silk Road, regulating and promoting trade, and controlling immigration and emigration. The architectural features of the Great Wall were enhanced with the construction of watch towers, garrison stations, signaling capabilities through the use smoke and fire, and the path of the Great Wall also served as a transportation corridor.
The Great Wall stretches from the east of Dandong to the west of Lop Lake, the path roughly demarcates the southern edge of the internal Mongolian region. Comprehensive archaeological research using advanced technology has found that the Ming dynasty walls measure 8,850 km in length. This includes 6,259 km of actual wall, 359 km of trenches and 2,232 km of natural barriers such as mountains and rivers. Another archaeological study has determined that the overall wall and its various branches are a total of 21,196 km in length.
Great Wall of China, series of fortifications built along the historical border of China
Location: Hebei, Beijing, Tianjin, Shanxi, Inner Mongolia, Shaanxi, Ningxia, Gansu, Xinjiang, Shandong, Henan, Hubei, Hunan, Sichuan, Qinghai
Height: 5 m
Length: 21,196 km
Width: 4.5 m