Gansu (UKgæn'suː, USgɑːn-; alternately romanized as Kansu) is a province in Northwest China. Its capital and largest city is Lanzhou, in the southeast part of the province.
The seventh-largest administrative district by area at , Gansu lies between the Tibetan and Loess plateaus and borders Mongolia (Govi-Altai Province), Inner Mongolia and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south and Shaanxi to the east. The Yellow River passes through the southern part of the province. Part of Gansu's territory is located in the Gobi Desert. The Qilian mountains are located in the south of the Province.
Gansu has a population of 26 million, ranking 22nd in China. Its population is mostly Han, along with Hui, Dongxiang and Tibetan minorities. The most common language is Mandarin. Gansu is among the poorest administrative divisions in China, ranking 31st, last place, in GDP per capita as of 2019.
The State of Qin originated in what is now southeastern Gansu and went on to form the first known Empire in what is now China. The Northern Silk Road ran through the Hexi Corridor, which passes through Gansu, resulting in it being an important strategic outpost and communications link for the Chinese empire.
The city of Jiayuguan, the second most populated city in Gansu, is known for its section of the Great Wall and the Jiayuguan Pass fortress complex.
Gansu is a compound of the names of Gānzhou (now the main urban district and seat of Zhangye) and Sùzhou (an old name and the modern seat of Jiuquan), formerly the two most important Chinese settlements in the Hexi Corridor.
Gansu is abbreviated as "" () or "" (), and was also known as Longxi () or Longyou () prior to early Western Han dynasty, in reference to the Long Mountain (the modern day Liupan Mountain's southern section) between eastern Gansu and western Shaanxi.
Until 1987, Gansu was rendered in the postal romanization and Wade-Giles as Kansu, which gradually replaced by pinyin starting in 1958.
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Xinjiang, officially the Xinjiang Uygur Autonomous Region, is an autonomous region of the People's Republic of China (PRC), located in the northwest of the country at the crossroads of Central Asia and East Asia. Being the largest province-level division of China by area and the 8th-largest country subdivision in the world, Xinjiang spans over and has about 25 million inhabitants. Xinjiang borders the countries of Mongolia, Russia, Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan, Pakistan and India.
Qinghai tʃɪŋˈhaɪ, (; alternately romanized as Tsinghai, Ch'inghai), also known as Kokonor, is a landlocked province in the northwest of the People's Republic of China. It is the largest province of China by area and has the third smallest population. Its capital and largest city is Xining. Qinghai borders Gansu on the northeast, Xinjiang on the northwest, Sichuan on the southeast and the Tibet Autonomous Region on the southwest. Qinghai province was established in 1928 during the period of the Republic of China, and until 1949 was ruled by Chinese Muslim warlords known as the Ma clique.
Sichuan (sɪtʃˈwɑːn; , sɹ̩̂.ʈʂhwán; ; alternatively romanized as Szechuan or Szechwan) is a province in Southwest China occupying most of the Sichuan Basin and the easternmost part of the Tibetan Plateau between the Jinsha River on the west, the Daba Mountains in the north and the Yungui Plateau to the south. Sichuan's capital city is Chengdu. The population of Sichuan stands at 83 million. Sichuan neighbors Qinghai to the northwest, Gansu to the north, Shaanxi to the northeast, Chongqing to the east, Guizhou to the southeast, Yunnan to the south, and the Tibet Autonomous Region to the west.
Precipitation isotope data were used to determine the origin of groundwater in the Badain Jaran Desert (BJD) in the study of Wu et al. (2017). Both precipitation and its isotope composition vary seasonally, so arithmetic averages of precipitation isotope v ...