民勤的那次旅行虽然已经日渐遥远,那段经历却总是让人刻骨铭心。2001年的七八月之交,我随西安大学生绿色营,来到位于甘肃河西走廊东北部的民勤县。那是一方充满苍凉之美的土地,一片在石羊河下游的绿洲。时至今日,我仍然会经常想起民勤,想起在漫漫风沙线上,守护着数百个风沙口,? Although the Minqin travel that day has been faraway, that experience is always unforgettable. At the turn of July and August 2001, I went to Minqin County, located in northeastern Hexi Corridor, Gansu, with the Xi’an University Green Camp. It is one of the land full of desolate beauty, an oasis in the lower reaches of Shiyang River. Today, I still often think of Minqin, remembered in the long sand line, guarding hundreds of sand port,?