位于内蒙古西部的额济纳是一个曾经拥有灿烂辉煌的居延文化地区,历史和文物、古迹记录至少有2000多年的文明。随着历史变革、环境变迁,生态危机逐渐浮现。这种危机不仅仅是荒漠化和水土流失造成土地以及草原资源损失,更重要的是它危及国土安全、危害国防建设、影响国家航天科技 Ejina, located in the western part of Inner Mongolia, is a civilization that used to have a splendid history of Juyan culture, history and cultural relics, and historic sites that have been recorded for at least 2,000 years. As history changes and the environment changes, the ecological crisis gradually emerges. This crisis is not only caused by the loss of land and grassland resources caused by desertification and soil erosion, but more importantly, it threatens the security of homeland, endanger the building of national defense and affect the national aerospace science and technology