Ancient Yanbian Great Wall

　　   The Ancient Yanbian Great Wall starts on the slopes of Erdaogou Village, Tushan Township, Helong County in the west, winds through the rugged mountains of Xicheng and Longmen Townships in Helong City, Xilinhe, Taoyuan, Tongfo in Longjing City, as well as Badagou, Yanji, and Chang’an Townships in Yanji City, before disappearing near Mopan Mountain, about 15 kilometers east of Yanji City. It is mostly built from earth, though some sections are stone. The total length is approximately 150 kilometers, with 17 beacon towers discovered so far. The longest discovered section stretches about 10 kilometers from Xilinhe to Laotougou Town, while the best-preserved section is in Guanchuan Village, Laotougou, where walls still stand about 3 meters high.

　　   There are no historical documents recording this ancient Great Wall. Research suggests it may have been part of the Jiangcheng of the Eastern Xia Kingdom. Some believe it was originally built during the Bohai Kingdom and, together with the “border trench” in Hunchun, served as a defensive structure for the Central and Eastern Capitals of Bohai, later repurposed and modified as a fortification by the Eastern Xia. Others propose it might be a remnant of the Jin Dynasty Great Wall or even from the Goguryeo period.