CHANGCHUN: Chinese archaeologists have discovered 11 possible sections of ruins of the Great Wall of Qin (221 B.C. and 206 B.C.) and Han (202 B.C. and 220 A.D.) dynasties in northeast China's Jilin Province, with four of them confirmed, according to a report of the China News Service.
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The Great Wall was built in different historical periods. The exact length of it built in the Ming Dynasty (1368-1644) was announced to be 8,851.8 km in December 2008 by a national survey team.