Northwestern China in the context of "Gansu"

Xi'an is the capital of the Chinese province of Shaanxi. A sub-provincial city on the Guanzhong plain, the city is the third-most populous city in Western China after Chongqing and Chengdu, as well as the most populous city in Northwestern China. Its total population was 12.95 million in the 2020 census, including an urban population of 9.28 million.

Xi'an is one of the oldest cities in China. Known as Chang'an throughout much of its history, Xi'an is one of China's Four Great Ancient Capitals, having held the position under several of the most important dynasties in Chinese history, including the Western Zhou, Qin, Western Han, Sui, Northern Zhou and Tang. Xi'an is now the second-most popular tourist destination in China. The city was one of the terminal points on the Silk Road during the ancient and medieval eras, as well as the home of the 3rd-century BC Terracotta Army commissioned by Emperor Qin Shi Huang—both of which are listed as World Heritage Sites by UNESCO.

East Turkestan or East Turkistan (Uyghur: شەرقىي تۈركىستان, ULY: Sherqiy Türkistan, UKY: Шәрқий Туркистан) is a loosely defined geographical region in the northwestern part of the People's Republic of China, on the cross roads of East and Central Asia. The term was coined in the 19th century by Russian Turkologists, including Nikita Bichurin, who intended the name to replace the common Western term for the region, "Chinese Turkestan", which referred to the Tarim Basin in Southern Xinjiang. Beginning in the 17th century, Altishahr, which means "Six Cities" in Uyghur, became the Uyghur name for the Tarim Basin. Uyghurs also called the Tarim Basin "Yettishar," which means "Seven Cities," and even "Sekkizshahr", which means "Eight Cities" in Uyghur. Chinese dynasties from the Han dynasty to the Tang dynasty had called an overlapping area the "Western Regions".

Starting in the 20th century, the Turkic Muslim Uyghur separatists and their supporters used East Turkestan as an appellation for the whole of Xinjiang (the Tarim Basin and Dzungaria) or for a future independent state in present-day Xinjiang Uyghur Autonomous Region. They reject the name Xinjiang (meaning "New Frontier" in Chinese) because of the Chinese perspective reflected in the name, and prefer East Turkestan to emphasize the connection to other, western Turkic groups.

Shaanxi is a province in north Northwestern China bordering the province-level divisions of Inner Mongolia to the north; Shanxi and Henan to the east; Hubei, Chongqing, and Sichuan to the south; and Gansu and Ningxia to the west. Shaanxi covers an area of over 205,000 km (79,000 sq mi) with about 37 million people, the 16th-largest in China. Xi'an, which includes the sites of the former capitals Fenghao and Chang'an – is the provincial capital and largest city in Northwest China and also one of the oldest cities in China. It is also the oldest of the Four Ancient Capitals, being the capital for the Western Zhou, Western Han, Jin, Sui and Tang dynasties. Xianyang, which served as the capital of the Qin dynasty (221–206 BC), is just north across the Wei River. The other prefecture-level cities into which the province is divided are Ankang, Baoji, Hanzhong, Shangluo, Tongchuan, Weinan, Yan'an and Yulin.

The province is geographically divided into three parts, namely Northern (or "Shaanbei"), Central ("Shaanzhong") and Southern Shaanxi (or "Shaannan"). Northern Shaanxi makes up the southeastern portion of the Ordos Basin and mainly comprises the two prefectural cities of Yulin and Yan'an on the northern Loess Plateau, demarcated from the Ordos Desert and the grasslands of Inner Mongolia's Ordos City by the Ming Great Wall. Central Shaanxi is also known as the Guanzhong region, and comprises the drainage basin of lower Wei River east of Mount Liupan and north of the Qinling Mountains, where the majority of Shaanxi's population reside. Southern Shaanxi comprises the three prefectural cities in the edge of the historical Bashu region south of the Qinling Mountains and includes the three mountainous cities of Hanzhong, Ankang and Shangluo.

Western China (中国西部 or 华西) is the west of China. It consists of Southwestern China and Northwestern China. In the definition of the Chinese government, Western China covers six provinces (Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, and Qinghai), three autonomous regions (Tibet, Ningxia, and Xinjiang), and one direct-administered municipality (Chongqing).

Hotan (Uyghur: خوتەن, romanized: Xoten; Chinese: 和田; pinyin: Hétián) is a major oasis town in southwestern Xinjiang, an autonomous region in Northwestern China. The city proper of Hotan broke off from the larger Hotan County to become an administrative area in its own right in August 1984. It is the seat of Hotan Prefecture.

With a population of 408,900 (2018 census), Hotan is situated in the Tarim Basin some 1,500 kilometres (930 mi) southwest of the regional capital, Ürümqi. It lies just north of the Kunlun Mountains, which are crossed by the Sanju, Hindutash and Ilchi passes. The town, located southeast of Yarkant County and populated almost exclusively by Uyghurs, is a minor agricultural center. An important station on the southern branch of the historic Silk Road, Hotan has always depended on two strong rivers, the Karakash River and the White Jade River, to provide the water needed to survive on the southwestern edge of the vast Taklamakan Desert. The White Jade River still provides water and irrigation for the town and oasis.

Qinghai is an inland province in Northwestern China. It is the largest province of China (excluding autonomous regions) by area and has the third smallest population with its capital and largest city being 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. The Chinese name "Qinghai" is after Qinghai Lake, the largest lake in China. The lake is known as Tso ngon in Tibetan, and as Kokonor Lake in English, derived from the Mongol Oirat name for Qinghai Lake. Both Tso ngon and Kokonor are names found in historic documents to describe the region.

Ningxia, officially the Ningxia Hui Autonomous Region, is an autonomous region in Northwestern China. Formerly a province, Ningxia was incorporated into Gansu in 1954 but was later separated from Gansu in 1958 and reconstituted as an autonomous region for the Hui people, one of the 56 officially recognised nationalities of China. Twenty percent of China's Hui population lives in Ningxia.

Ningxia is bounded by Shaanxi to the east, Gansu to the south and west and Inner Mongolia Autonomous Region to the north and has an area of around 66,400 square kilometres (25,600 sq mi). This sparsely settled, mostly desert region lies partially on the Loess Plateau and in the vast plain of the Yellow River and features the Great Wall of China along its northeastern boundary. Over about 2000 years, an extensive system of canals (with a total length of approximately 1397 kilometers) has been built from Qin dynasty. Extensive land reclamation and irrigation projects have made increased cultivation possible. The arid region of Xihaigu, which covers large parts of the province, suffers from severe water shortage, which the canals were intended to alleviate.