2002年11月,中国惟一的水上长城辽宁九门口长城通过联合国教科文组织的验收,作为长城的一部分正式挂牌,成为世界文化遗产。九门口,位于辽宁东戴河新区,古称一片石,明代以前是一条交通要道。明洪武十三年(1380年),著名将领徐达奉旨修筑九门口段长城,竣工后,徐达和设计师们根据九门口所处的险要地理位置,开掘出一条从长城 In November 2002, the Great Wall of China, the only water wall in China, was approved by UNESCO as the Great Wall and was officially listed as part of the Great Wall and became a World Cultural Heritage. Nine doors, located in Dong Dai River in Liaoning New Area, the ancient name of a stone, was a traffic arteries before the Ming Dynasty. Ming Hongwu thirteen years (1380), the famous general Xu Da imperial edict built Nine Great Wall, upon completion, Xu Da and designers according to the location of nine in danger of digging out a from the Great Wall