昔日的大西北的”陕甘宁”，曾被视为荒凉、贫困、闭塞之区与革命根据地，如今已成为各有特色的旅游胜地可是，有人说，陕西有“世界奇迹”秦始皇兵马桶，有保存较好的西安古城与诸多古迹，还有革命圣地延安；甘肃有驰名世界的敦煌石窟、天水麦积山石窟─—在中国”四大石窟”? However, some people said that Shaanxi has “the miracle of the world” Qin Shihuang soldiers in the toilet, and Shaanxi’s Shaanxi-Gansu-Ningxia, once considered as a desolate, impoverished and occluded area and revolutionary base, has now become a tourist attraction with its own characteristics. There are well-preserved ancient city of Xi’an and many monuments, as well as Yan’an Revolutionary Holy Land; Gansu has world-famous Dunhuang Grottoes, Tianshui Maijishan Grottoes ─ ─ in China, “Four Grottoes?”