中国西北高原上的河西走廊,是古丝绸之路上的咽喉要道,也是当今我国陆路沟通亚欧大陆各国的最重要的桥梁。源于祁连山的石羊河、黑河、疏勒河三大水系,灌溉着河西走廊的近66.67万hm~2耕地,养育着400多万人 The Hexi Corridor on the northwestern plateau of China is the key point on the ancient Silk Road and is also the most important bridge linking overland countries in Asia and Europe in our land today. From the Qilian Mountains Shiyang River, Heihe, Shule River three major irrigation systems, irrigation Hexi Corridor nearly 666,700 hm ~ 2 cultivated land, raising more than 4 million people