The Great Wall of Han Dynasty

In 206 B.C., the Qin Dynasty was overthrown due to its tyrannical rule mostly for the large expenses required for building the Wall. In 202 B.C., after several years' civil war, it was finally replaced by a new feudal dynasty -- the Han Dynasty. Accompanying the renewal of the economy during the post-war time, Huns in the north was stronger than ever and ambitious. On the other hand, the economy of the Han Dynasty recovered, and the military strength was becoming powerful too. To consolidate the frontier, keep Xiongnu outside, ensure a peaceful environment and protect the smooth trade with kingdoms in West Asia, Emperor Hanwudi ordered to build the wall, general Weiqing set up Shuofangzhen County and repaired a part of the wall left by the Qin Dynasty.

Later, Han built walls mainly for three times. And the three walls combined as one, celebrated as the Hexi-Region Wall of Han Dynasty, which linked up to a fair part of the Qin-Dynasty Wall, forming a new wall that ran up to 10,000 kilometers, the longest wall in Chinese history that traversed present six provinces, i.e. Liaoning, Inner Mongolia, Hebei, Ningxia, Gansu and Xinjiang. The east end of the Wall extended to as far as the north part of Korea. Containing a large part of the Wall of the Qin Dynasty, the 10,000-kilometer Wall is also referred to as the Qin-Han Great Wall.