CHANGCHUN, Dec. 13 (Xinhua) -- 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.

    The ruins were found in Tonghua county by a research team organized by the province at the request of the State Administration of Cultural Heritage in June, the service reported Saturday.

    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.