Ming Shilu
Numerous Ming dynasty records and poems mentioned a "border wall" () that reached the banks of Yalu River, forming a part of Ming's defense system on the northern frontier. The date of its construction was documented by the "Ming Shilu" as the 15th year of Chenghua era (AD 1479). Archives of Andong (Dandong) county put the wall's location to the north of the Ai River (), in the Hushan area. A series of surveys in late 1980s and early 1990s led by architectural historian identified the ruins at Hushan as the site of the eastern terminus of this Great Wall section. An long section was restored in 1992.