我国西汉时期,在罗布泊地区有一个楼兰国,它的城郭——楼兰城,曾经是古丝道上重要的交通枢纽。但是这样一座公元前后活跃了几个世纪的城市,到公元四世纪后竟然完全消失了。后来,在沙漠深处,人们发现了一片方圆20千米的古城遗址,紧邻干涸的尼雅河床。据说考古工作者发现它时,覆 During the Western Han Dynasty in our country, there was a Loulan country in the Lop Nur region, and its city of Loulan City, once an important transportation hub on the ancient Silk Road. However, such a city that has been active for centuries before and after the Christian era disappeared completely in the fourth century AD. Later, in the depths of the desert, people found an ancient city ruled 20 km radius, close to the bed of the dried up Niya River. Archeologists are said to find it covered