A report on Qinghai, Gansu and Xinjiang

Western missionaries who entered Gansu and Shaanxi after the 18th century, on the other hand, considered the Hui in the north-western provinces an ethnic group between the Turkic, Han and Arab peoples.

The study also showed that there is a close genetic affinity among these ethnic minorities in Northwest China (including Uyghurs, Huis, Dongxiangs, Bonans, Yugurs and Salars) and that these cluster closely with other East Asian people, especially in Xinjiang, followed by Mongolic, and Tungusic speakers, indicating the probability of a shared recent common ancestor of "Altaic speakers".

Joseph Fletcher cited Turkic and Persian manuscripts related to the preaching of the 17th century Kashgarian Sufi master Muhammad Yūsuf (or, possibly, his son Afaq Khoja) inside the Ming Empire (in today's Gansu and/or Qinghai), where the preacher allegedly converted ulamā-yi Tunganiyyāh (i.e., "Dungan ulema") into Sufism.

However, this article refers specifically to two waves of uprising by various Chinese Muslims, mostly Hui people, in Shaanxi, Gansu and Ningxia provinces in the first wave, and then in Xinjiang in the second wave, between 1862 and 1877.

When the Qing forces under Zuo Zongtang put down the Dungan Revolt, the sons of Muslim Hui and Salar rebel leaders like Ma Benyuan (马本源) and Ma Guiyuan (马桂源) in Ningxia, Gansu and Qinghai were castrated by the Qing Imperial Household Department once they became 11 years old and were sent to work as eunuch slaves for Qing garrisons in Xinjiang and the wives of the rebel leaders were also enslaved.

Northwest China is a statistical region of China which includes the autonomous regions of Xinjiang and Ningxia and the provinces of Shaanxi, Gansu and Qinghai.

The Salar's live mostly in the Qinghai-Gansu border region, on both sides of the Yellow River, namely in Xunhua Salar Autonomous County, Hualong Hui Autonomous County of Qinghai and the adjacent Jishishan Bonan, Dongxiang and Salar Autonomous County of Gansu and in some parts of Henan and Shanxi.

There are also Salars in Northern Xinjiang (in the Ili Kazakh Autonomous Prefecture).

Lanzhou is the capital and largest city of Gansu Province in Northwest China.

Later it fell into the hands of the Western Xia dynasty (which flourished in Qinghai from the 11th to 13th century) and was subsequently absorbed by the Song dynasty (960–1126) in 1081.

This highway remained the primary traffic route of northwestern China until the completion of the railway from Lanzhou to Ürümqi, Xinjiang.

However, the Tang did manage to restore at least indirect control over former Tang territories as far west as the Hexi Corridor and Dunhuang in Gansu.

In fact, it was during this rebellion that the Tang withdrew its western garrisons stationed in what is now Gansu and Qinghai, which the Tibetans then occupied along with the territory of what is now Xinjiang.

Of the 22 provinces and 5 autonomous regions of the PRC, only 9 provinces (Yunnan, Guizhou, Qinghai, Heilongjiang, Sichuan, Gansu, Jilin, Hubei, Hunan) and 3 autonomous regions (Xinjiang, Tibet, Inner Mongolia) have at least one or more second level or prefectural level divisions that are not prefectural level cities.