The great wall of China as a fortress, which is long and wide with a Fort. Most of the walls that appear in the current generated in the Qin dynasty to prevent aggression from their invasion of Chinese civilization that Hans in an era sightseeing since Zhou dynasty (c. 400 years before Christ), due to an invasion of China along the northern border. Hsin wong on the creation of thousands of refugees along the border wall to protect them from their strange ethnic Turks Hans Mongolia and Manchuria.