居延海位于内蒙古自治区额济纳旗北部,形状狭长弯曲,犹如新月,额济纳河汇入湖中,是居延海最主要的补给水源。居延是匈奴语,其意为弱水流沙,在汉代时称其为居延泽,魏晋时称之为西海,唐代起称之为居延海,现称天鹅湖。居延海地区自远古以来就是一片碧海云天、树木葱茏的好地方。存中华民族发展史上,特别是在西北少数民族发展史上具有重要地位。自先秦以来,这里几度繁荣鼎盛,又几经战乱破坏,历尽沧桑。她以浩瀚的水域、肥沃的土地、富庶 Juyanhai is located in the northern part of Ejin Banner in Inner Mongolia Autonomous Region. Its shape is long and curved, like a new moon. The Ejin River flows into the lake and is the main supply source of Juyan Sea. Juyan is the Huns language, which means weak water quicksand, in the Han Dynasty called it Juyan Ze, Wei and Jin called the West Sea, the Tang Dynasty called Juyan sea, is now called Swan Lake. Juyanhai area since ancient times is a blue sky, a verdant tree a good place. Save the development history of the Chinese nation, especially in the history of the development of the ethnic minorities in Northwest China. Since the pre-Qin, here several times the prosperity flourished, and after several years of war damage, experienced vicissitudes. Her vast waters, fertile land, rich