Yumenguan was first set up by Emperor Wu of the Han Dynasty when he opened the road to the Western Regions and set up four counties in Hexi, so it was named after the jade introduced from the Western Regions. In the Han Dynasty, it was the gateway to the western regions, so it was located in Xiaofangcheng, northwest of Dunhuang, Gansu.
Between the northwest of Dunhuang in Gansu and the southeast of Xinjiang Uygur Autonomous Region. When the Great Wall between Jiuquan and Yumen was built in Ding Yuan or Yuanfeng (BC 1 16 BC 105 BC), Yumen Pass should be set up.
Yumenguan Scenic Area:
Yumenguan Castle is square in plane, 24 meters long from east to west and 26.4 meters wide from north to south, with a total area of more than 630 square meters. There is a big east-west lane under the slope in the north of the city, which was a bus post road between the Central Plains and the western countries in history.
The existing city wall is 9.7 meters high, about 3 meters wide, and the wall base is 5 meters wide. There is a city wall on it, and there is a horse road at the southeast corner of the city. It was once an important military pass in the Han Dynasty and the traffic artery of the Silk Road.
The Great Wall of Han Dynasty is an important part of the military defense system in Hexi area in Han Dynasty, and it is also the historical epitome of the whole northern defense project construction in Western Han Dynasty. Despite thousands of years of wind and rain erosion, it still stands on the Gobi Desert, as if telling people about the grandeur and prosperity of the desert. Dunhuang Great Wall of Han Dynasty is the longest and best preserved Great Wall of Han Dynasty, which has important research value and ornamental value.