Yumenguan, Guan Ming. Martial emperor of Han dynasty sets. Because of the western region input jade when via acquires fame in this. When Chinese to lead to the western region regional gateways. Former site in now Gansu Dunhuang northwest small squares plate city. Yangguan, Yumenguan, once was the Han Dynasty time important military mountain pass and the silk road key communication line. Mentions Yumenguan, everybody will think will immediately enjoy great popularity the Tang poem, this will be Wang Zhihuan "the Liangzhou Word": “on between Yellow River far white clouds, orphaned city Wan Renshan. Why must does the bamboo flute complain about the willow, spring breeze not Yumenguan.”In the poem that solemn and stirring desolate mood, initiates us to this ancient Guan Sai yearning. Yumenguan, popular name small squares plate city, located at the Dunhuang northwest 90 kilometers place. Hands down when the Western Han Dynasty the western region Hetian's beautiful jade, enters the area south of Yellow River after this important pass, therefore acquires fame. The automobile goes along 215 federal highways to the west, turns surpasses the Altun, may arrive at Qinghai Province's Tsaidam, the western oil field, the Xinjiang Ruoqiang and Tibet Lhasa. Today goes to the Yumenguan scenic area, may appreciate to the vast Gobi scenery, as well as illusory mirage; The shape lifelike rests naturally in Buddha as well as Gobi's psammophyte. As soon as these sceneries and the blue sky, the desert, the green grass constituted have compelled the vast sublime mysterious picture. Mentions Yumenguan first to talk about Zhang Qian goes abroad on a diplomatic mission western region phase of historical , after the Silk Road clear, the East and West culture, the trade exchange day after day are prosperous, to guarantee that the Silk Road is safe and is unimpeded. Approximately 121 B.C. ---during 107 years, Martial emperor of Han dynasty issued an order to construct “two passes”, namely: Yangguan, Yumenguan.
the present's Chinese Yumenguan vestige, is a four square shape small castle, towers, in the thing moves toward in the Gobi Desert strip on the sand and crushed stone hillock, the south side has the salt alkaloid swampy ground, the north side not far away is Har Lake, toward the north is again the Great Wall, north the Great Wall is the Shulehe river old path. The thing moves toward the Great Wall winds to meander, vast, every other 5 miles or 10 miles, build have a square shape beacon tower, in Great Wall beacon-fire periphery, but also has the obvious house vestige. In the thing Great Wall south, the Great Wall which and some north and south move toward, bypasses west side Yumenguan, goes directly to Yangguan to the south, north Guan Cheng the slope thing moves toward the traffic lane to go nonstop to the western region. Yumenguan Guan Cheng all builds with the yellow earth rammer becomes, area approximately more than 600 square meters. The city wall thing length 245 meters, the north and south width 264 meters, in the remnant height 97 meters city walls wide are 37 meters, under the thing wall the width 4 meters, under the northwest wall the width 49 meters, west opens, north two. The city goes against all around has the width 13 meters aisles, is equipped with the inside and outside parapets. In the city the southeast has a strip width insufficient 1 meter training ground, transfers depending on the east wall to the south may go directly to the crown.
Old is Yongzhou Gansu provincial capital Lanzhou. Located in the upper Yellow River, located in the geographical center of China, between latitude 32 ° 31 '~ 42 ° 57', longitude 92 ° 13 '~ 108 ° 46' between. It is the east, Shaanxi, Qinghai, Sichuan controlled South, West Hill Xinjiang, brief Inner Mongolia, Ningxia, is the ancient Silk Road of the key sections of land and gold, and with the Mongolian border, it was like a magnificent gem, set in central China the Loess Plateau, Qinghai and Inner Mongolia plateau, something more than 1,600 kilometers meandering, aspect 453,700 square kilometers, accounting for 4.72% of the total area. Population 26 million (968 million in 1949), Han, Hui, Tibetan, Dongxiang, Yugu, Baoan, Mongolian, Kazak, Tu, Salar, Manchu and other ethnic groups. Among them, the Dongxiang, Yugur, Bonan is a minority of Gansu.