Qinghai (; pronounced ), also known as Tsinghai,formerly known in English as Kokonor, is a province of the People's Republic of China located in the northwest of the country. As one of the largest province-level administrative division of China by area, the province is ranked fourth-largest in size, but has the third-smallest population.
Located mostly on the Qinghai-Tibet plateau, the province has long been a melting pot for a number of ethnic groups including the Han, Tibetans, Hui, Tu, Mongols, and Salars. Qinghai borders Gansu on the northeast, the Xinjiang on the northwest, Sichuan on the southeast, and the Tibet Autonomous Region on the southwest. Qinghai province was established in 1928 under the Republic of China period during which it was ruled by Chinese Muslim warlords known as the Ma clique. The Chinese name, "Qinghai" is named after Qinghai Lake (cyan sea lake), the largest lake in China. The province was known formerly as Kokonur in English, derived from the Oirat name for Qinghai Lake.
During China's Bronze Age, Qinghai was home to the Qiang people who traditionally made a living in agriculture and husbandry, the Kayue culture. The eastern part of the area of Qinghai was under the control of the Han Dynasty about 2000 years ago. It was a battleground during the Tang and subsequent Chinese dynasties when they fought against successive Tibetan tribes.
In the middle of 3rd century CE, nomadic people related to Xianbei migrated to pasture lands around Koko Nur (Qinghai Lake) and established Tuyuhun Kingdom. Since the 7th century, Tuyuhun Kingdom was attacked by both the Tibetan Empire and Tang Dynasty as both of them sought control over trade routes. Military conflicts severely weakened the kingdom and it was incorporated into the Tibetan Empire. After the disintegration of the Tibetan Empire, small local factions emerged, some under the titular authority of China. During the Yuan Dynasty's administrative rule of Tibet, the region comprising the headwaters of the Yellow and Yangtze rivers - what modern Tibetan nationalists call "Amdo" - was apportioned to different administrative divisions than Tibet proper.
Most of Qinghai was once also a short time under the control of early Ming Dynasty, but later gradually lost to the Khoshut Mongols. The Xunhua Salar Autonomous County is where most Salar people live in Qinghai. The Salars migrated to Qinghai from Samarkand in 1370. The chief of the four upper clans around this time was Han Pao-yuan and Ming granted him office of centurion, it was at this time the people of his four clans took Han as their surname. The other chief Han Shan-pa of the four lower Salar clans got the same office from Ming, and his clans were the ones who took Ma as their surname.
From 1640 to 1724, a big part of the area that is now Qinghai was under Khoshut Mongol control, but in that year it was conquered by the armies of the Qing Dynasty. It was during the 1720s when Xining Prefecture was established and its borders were roughly those of modern Qinghai province. Xining, the capital of modern Qinghai province was built in this period as the administrative center. During the rule of Qing Dynasty, the governor was a viceroy of the Qing Emperor, but the local ethnic groups enjoyed much autonomy. Many chiefs retained their traditional authority, participating in local administrations. The Dungan revolt (1862–77) devastated the Hui Muslim population of Shaanxi, shifting the Hui center of population to Gansu and Qinghai. The Dungan revolt (1895–1896) broke out in Qinghai in 1895. The Dungan Revolt (1895) was a rebellion of various Muslim ethnic groups in Qinghai and Gansu against the Qing Dynasty. Following the overthrow of the Qing Dynasty, the region came under Chinese Muslim warlord Ma Qi control until the Northern Expedition by the Republic of China consolidated central control in 1928.
Ma Bufang increased the prominence of the Hui and Salar people in Qinghai's politics by heavily recruiting to his army from the counties in which those ethnic groups predominated. General Ma started a state run and controlled industralization project, directly creating educational, medical, agricultural, and sanitation projects, run or assisted by the state. The state provided money for food and uniforms in all schools, state run or private. Roads and a theater were constructed. The state controlled all the press, no freedom was allowed for independent journalists.
As the 1949 Chinese revolution approached Qinghai, Ma Bufang abandoned his post and flew to Hong Kong, traveling abroad but never returning to China. On January 1, 1950, the Qinghai Province People's Government was declared, owing its allegiance to the new People's Republic of China. Aside from some minor adjustments to suit the geography, the PRC maintained the province's territorial integrity. Resistance to Communist rule continued in the form of the Huis' Kuomintang Islamic insurgency (1950-58), spreading past traditionally Hui areas to the ethnic-Tibetan south. Although the Hui comprised 15.6% of Qinghai's population in 1949, making the province the second-largest concentration of Hui after Ningxia, the state denied the Hui ethnic autonomous townships and counties that their numbers warranted under Chinese law until the 1980s.