Hexi Corridor in the context of "Qilian Mountains"

The Northern Liang (Chinese: 北涼; pinyin: Běi Liáng; 397–439) was a dynastic state of China and one of the Sixteen Kingdoms in Chinese history. It was ruled by the Juqu (沮渠) family of Lushuihu ethnicity, though they are sometimes categorized as Xiongnu in some historiographies. Although Duan Ye of Han ethnicity was initially enthroned as the Northern Liang ruler with support from the Juqu clan, Duan was subsequently overthrown in 401 and Juqu Mengxun was proclaimed monarch.

All rulers of the Northern Liang proclaimed themselves "wang" (translatable as either "prince" or "king"). It was also only known as "Liang" (涼) from 399 to 401 and from 431 to 433, as their rulers took on several lesser titles while they were acting as vassals. To distinguish with the other Liang states, they were given the prefix of "Northern" by historiographers as they controlled northern Gansu when they first established. They later went on to rule the entirety of the Hexi Corridor with the key city of Guzang (姑臧, in modern Wuwei, Gansu) as their capital.

Dunhuang (or DunHuang, listen) is a county-level city in northwestern Gansu Province, Western China. According to the 2010 Chinese census, the city has a population of 186,027, though 2019 estimates put the city's population at about 191,800. Sachu (Dunhuang) was a major stop on the ancient Silk Road and is best known for the nearby Mogao Caves.

Dunhuang is situated in an oasis containing Crescent Lake and Mingsha Shan (鳴沙山, meaning "Singing-Sand Mountain"), named after the sound of the wind whipping off the dunes, the singing sand phenomenon. Dunhuang commands a strategic position at the crossroads of the ancient Southern Silk Route and the main road leading from India via Lhasa to Mongolia and southern Siberia, and also controls the entrance to the narrow Hexi Corridor, which leads straight to the heart of the north Chinese plains and the ancient capitals of Chang'an (today known as Xi'an) and Luoyang.

The Ganzhou Uyghur Kingdom (traditional Chinese: 甘州回鶻; simplified Chinese: 甘州回鹘; pinyin: Gānzhōu Huíhú), also referred to as the Hexi Uyghurs (traditional Chinese: 河西回鶻; simplified Chinese: 河西回鹘; pinyin: Héxī Huíhú), was a Turkic dynastic state ruled by the Uyghur Yaglakar clan. It was established in 894 around Ganzhou in modern-day Zhangye, and lasted until 1036. During that time, many of Ganzhou's residents converted to Buddhism.

The Hexi Corridor, located within modern Gansu, was traditionally a Chinese inroad into Central Asia. From the 9th to 11th centuries this area was shared between the Ganzhou Uyghurs and the Guiyi Circuit. By the early 11th century both the Uyghurs and Guiyi Circuit were conquered by the Tangut people of the Western Xia dynasty.

The Northern Silk Road is a historic inland trade route in Northwest China and Central Asia (historically known as the Western Regions), originating in the ancient Chinese capital of Chang'an (modern day Xi'an), westwards through the Hexi Corridor (in what is the modern Gansu province) into the Tarim Basin, going around north of the Taklamakan Desert along the two sides of the Tianshan Mountains, and then past the Pamir Mountains to reach the ancient kingdoms of Bactria, Sogdia, Kushan, Parthia and eventually the eastern provinces of the Roman Empire. It is the northernmost branch of the several Silk Roads providing trade, cultural exchanges and military mobilizations between China and the outside world.

The route was first developed by the Han dynasty in the latter part of the 1st century BC to secure diplomatic alliance against the Xiongnu confederacy, with whom China had been having escalating conflicts, and was progressively transformed into a major trade route during the subsequent dynasties to project Chinese influence towards the west.

39°12′N 98°32′E / 39.200°N 98.533°E / 39.200; 98.533

The Qilian Mountains, together with the Altyn-Tagh sometimes known as the Nan Shan, as it is to the south of the Hexi Corridor, is a northern outlier of the Kunlun Mountains, forming the border between Qinghai and the Gansu provinces of northern China.

Xining is the capital and most populous city of Qinghai province in western China and the largest city on the Tibetan Plateau. As of the 2020 census, it had 2,467,965 inhabitants (2,208,708 as of 2010), of whom 1,954,795 lived in the built-up (or metro) area made of 5 urban districts. The city lies in the Huangshui River Valley, also known as Tsongkha (Tibetan: ཙོང་ཁ་), and owing to its high altitude, has a cool climate on the borderline between cool semi-arid and dry winter humid continental.

Xining was a commercial hub along the Northern Silk Road's Hexi Corridor for over 2000 years, and was a stronghold of the Han, Sui, Tang, and Song dynasties' resistance against nomadic attacks from the west. Although long a part of Gansu province, Xining was added to Qinghai in 1928. Xining holds sites of religious significance to Muslims and Buddhists, including the Dongguan Mosque and Kumbum Monastery. It is connected by the Qinghai–Tibet railway to Lhasa, Tibet and connected by a high-speed railway to Lanzhou, Gansu and Ürümqi, Xinjiang.

The Later Liang (simplified Chinese: 后凉; traditional Chinese: 後凉; pinyin: Hòu Liáng; 386–403) was a dynastic state of China and one of the Sixteen Kingdoms in Chinese history. It was founded by the Lü family of the Di ethnicity and given the prefix of "Later" in historiography to distinguish it with the Former Liang dynasty before them and the three Liang states (Southern, Northern and Western) that emerged during their collapse.

All rulers of the Later Liang proclaimed themselves "Heavenly King" (Tian Wang). The state's founder, Lü Guang initially took on lesser titles before declaring himself Heavenly King of Liang in 396, and so the state was only known as "Liang" (涼) from 396 to 403. The Later Liang at its peak controlled the Hexi Corridor in Gansu with Guzang (姑臧, in modern Wuwei, Gansu) as their capital. After the Southern Liang and Northern Liang broke away in 397, their territory was gradually reduced to their capital region in central Gansu.

Wuwei (Chinese: 武威; pinyin: Wǔwēi) is a prefecture-level city in northwest central Gansu province. In the north it borders Inner Mongolia, in the southwest, Qinghai. Its central location between three western capitals, Lanzhou, Xining, and Yinchuan makes it an important business and transportation hub for the area. Because of its position along the Hexi Corridor, historically the only route from central China to western China and the rest of Central Asia, many major railroads and national highways pass through Wuwei.