What best describes the significance of the great wall in the history of china

The Emperor Qin Shihuang's contribution to the design of the Wall is considered to be of great importance as it ensured peace for the people in the northern part of China Against the Huns and established a pattern of defense for future generations. The Great Wall of the Qin Dynasty was built at the expense of many lives. Many had died from the hard labor, it is said to be that even some were thrown inside the wall. 

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