{{Short description|Province in Northwestern China}}
{{Use dmy dates|date=October 2019}}
{{Infobox settlement
| name = Gansu
| native_name = {{lang|zh|甘肃}}
| other_name = Kansu
| type = [[Provinces of China|Province]]
| image_map = Gansu in China (+all claims hatched).svg
| map_size = 275px
| map_alt = Location of Gansu in China
| coordinates = {{Coord|38|N|102|E|type:adm1st|format=dms|display=it}}
| subdivision_type = Country
| subdivision_name = [[China]]
| named_for = {{ubl|{{linktext|lang=zh|甘}} {{tlit|zh|gān}}: [[Ganzhou, Zhangye|Ganzhou]]|{{linktext|lang=zh|肃}} {{tlit|zh|sù}}: [[Suzhou, Jiuquan|Suzhou]]}}
| seat_type = Capital
{{nobold|(and largest city)}}
| seat = [[Lanzhou]]
| parts_type = Divisions
| parts_style = para
| p1 = 14 [[List of administrative divisions of Gansu|prefectures]]
| p2 = 86 counties
| p3 = 1344 townships
| government_type = [[Provinces of China|Province]]
| governing_body = [[Gansu Provincial People's Congress]]
| leader_title = [[Party Secretary of Gansu|Party Secretary]]
| leader_name = [[Hu Changsheng]]
| leader_title1 = Congress chairman
| leader_name1 = Hu Changsheng
| leader_title2 = [[Governor of Gansu|Governor]]
| leader_name2 = {{ill|Kong Shaoxun|zh|孔绍逊}}
| leader_title3 = [[Chinese People's Political Consultative Conference|CPPCC]] chairman
| leader_name3 = [[Zhuang Guotai]]
| leader_title4 = [[National People's Congress]] Representation
| leader_name4 = [[Gansu delegation to the National People's Congress|52 deputies]]
| area_total_km2 = 453700
| area_rank = [[List of Chinese administrative divisions by area|7th]]
| elevation_max_m = 5830
| elevation_max_point = [[Altyn-Tagh]]
| population_footnotes = {{Cite web|date=11 May 2021|title=Communiqué of the Seventh National Population Census (No. 3)|url=http://www.stats.gov.cn/english/PressRelease/202105/t20210510_1817188.html|access-date=11 May 2021|publisher=[[National Bureau of Statistics of China]]}}
| population_total = 25,019,831
| population_as_of = 2020
| population_rank = [[List of Chinese administrative divisions by population|22nd]]
| population_density_km2 = auto
| population_density_rank = [[Provinces of China#List of provincial level divisions|27th]]
| demographics_type1 = Demographics
| demographics1_title1 = Ethnic composition
| demographics1_info1 = {{ubl|[[Han Chinese|Han]]: 91%|[[Hui people|Hui]]: 5%|[[Dongxiang people|Dongxiang]]: 2%|[[Tibetan people|Tibetan]]: 2%}}
| demographics1_title2 = Languages and dialects
| demographics1_info2 = {{hlist|[[Central Plains Mandarin]]|[[Lanyin Mandarin]]|[[Amdo Tibetan]]}}
| demographics_type2 = [[Gross domestic product|GDP]] {{normal|(2025)}}gansu's total permanent population at the end of 2023 is 24.6548 million, and at the end of 2024 it is 24.5834 million{{cite press release | url=http://tjj.gansu.gov.cn/tjj/c109450/202502/174079396.shtml | title=zh:(甘肃)关于2024年全省主要人口数据的通报 | publisher=gansu.gov | date=18 February 2025 | access-date=26 February 2025 }}{{Dead link|date=August 2025 |bot=InternetArchiveBot |fix-attempted=yes }} so that the mid-year population of gansu in 2024 is 24.6191 million. gansu's GDP in 2024 is CN¥1,300.29 billion, or US$182.58 billion (average annual exchange rate in 2024 is 1 US dollar to RMB 7.1217){{cite press release | url=http://tjj.gansu.gov.cn/tjj/c109459/202501/174064112.shtml | title=zh:(甘肃)2024年全省经济运行情况 | publisher=gansu.gov | date=20 January 2025 | access-date=26 February 2025 }}{{Dead link|date=August 2025 |bot=InternetArchiveBot |fix-attempted=yes }} Gansu's GDP per capita in 2024 based on the mid-year population is CN¥52,816 (US$7,416).
| demographics2_title1 = Total
| demographics2_info1 = {{CN¥|1,369.75 billion}} ([[List of Chinese provincial-level divisions by GDP|27th]]; US$191.76 billion)
| demographics2_title2 = Per capita
| demographics2_info2 = {{CN¥|55,897}} ([[List of Chinese provincial-level divisions by GDP per capita|31st]]; US$7,825)
| iso_code = CN-GS
| custom_label4_sec2 = [[Human Development Index|HDI]] {{normal|(2023)}}
| custom_data4_sec2 = 0.731{{cite web |title=Human Development Indices (8.0)- China |url=https://globaldatalab.org/shdi/table/shdi/CHN/?levels=1+4&years=2022&interpolation=0&extrapolation=0 |access-date=23 September 2024 |website=Global Data Lab}} ([[List of Chinese administrative divisions by HDI|29th]]){{snd}}{{color|#090|high}}
| website = {{URL|www.gansu.gov.cn}}
| official_name = Province of Gansu
| image = {{multiple image
|border = infobox
|total_width = 290
|image_style = border:1;
|perrow = 2/3/2
|image1 = Hoodoos at Zhangye Danxia.jpg
|image2 = Jiayuguan with Monument.jpg
|image3 = Mural Worshipping Bodhisattva.jpg
|image4 = 鸡峰山国家森林公园.jpg
|image5 = Launch of Shenzhou 13.jpg
|image6 = Labrang-Gisela-Brantl-02.JPG
|image7 = Zhongshan Bridge, Lanzhou (53724585497).jpg
|caption1 =[[Zhangye National Geopark]]
|caption2=[[Great Wall of China|Great Wall]] at [[Jiayu Pass]]
|caption3=[[Mogao Caves]]
|caption4=[[Longnan]]
|caption5=[[Jiuquan Satellite Launch Center]]
|caption6=[[Labrang Monastery]]
|caption7 =[[Zhongshan Bridge]], [[Lanzhou]]
}}
}}
{{Infobox Chinese
| pic = Gansu (Chinese characters).svg
| piccap = "Gansu" in simplified (top) and traditional (bottom) Chinese characters
| picupright = 0.4
| s = 甘肃
| t = 甘肅
| l = "[[Ganzhou, Zhangye|Ganzhou]] and [[Suzhou, Jiuquan|Suzhou]]"
| p = Gānsù
| bpmf = {{bpmfsp|ㄍㄢ|ㄙㄨˋ}}
| w = {{tonesup|Kan1-su4}}
| mi = {{IPAc-cmn|g|an|1|.|s|u|4}}
| suz = Koe1-soq7
| j = Gam1-suk1
| ci = {{IPAc-yue|g|am|1|.|s|uk|1}}
| y = Gām-sūk
| tl = Kam-siok
| xej = قًاسُ
| zh-dungan = Гансў
| tib = ཀན་སུའུ་ཞིང་ཆེན།
| wylie = kan su'u zhing chen{{Cite book|title=The Buddha party: how the people's Republic of China works to define and control Tibetan Buddhism |publisher=Oxford University Press |last=Powers|first=John|year=2017|isbn=9780199358151|location=New York|pages=Appendix B, page 6|oclc=947145370}}
| zwpy = Gainsu Xingqên
| order = st
| mong = {{MongolUnicode|ᠭᠠᠨᠰᠤ ᠮᠤᠵᠢ|style=max-height:5em; word-wrap:normal}}
| monr = ɣansu muǰi
| mon = Ганьсү муж
| uig = {{lang|ug|گەنسۇ ئۆلكىسى}}
| uly = {{nowrap|Gensu ölkisi}}
| usy = гәнсу өлкиси
| lang1 = kk
| lang1_content = {{nowrap|{{lang|kk-Arab|گانسۋ ولكەسى}}
{{lang|kk|Ганьсу өлкесі}}
{{lang|kk-Latn|Gansu ölkesi}}}}
}}
'''Gansu'''{{efn|{{IPAc-en|UK|g|æ|n|'|s|uː}} {{respell|gan|SOO}}, {{IPAc-en|US|g|ɑː|n|-}} {{respell|gahn|-}};{{Cite dictionary |url=http://www.lexico.com/definition/Gansu |archive-url=https://web.archive.org/web/20210302085027/https://www.lexico.com/definition/gansu |url-status=dead |archive-date=2 March 2021 |title=Gansu |dictionary=[[Lexico]] UK English Dictionary |publisher=[[Oxford University Press]]}}}} is a [[provinces of China|province]] in [[Northwestern China]]. Its capital and largest city is [[Lanzhou]], in the southeastern part of the province. The seventh-largest administrative district by area at {{convert|453700|km2}}, Gansu lies between the [[Tibetan Plateau|Tibetan]] and [[Loess Plateau|Loess]] plateaus and borders [[Xinjiang]] and [[Qinghai]] to the west, [[Sichuan]] to the south, [[Shaanxi]] to the east, and [[Inner Mongolia]], [[Ningxia]] and [[Mongolia]]'s [[Govi-Altai Province]] to the north. 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|Qilian mountains]] are located in the south of the Province.
Gansu has a population of 26 million, ranking [[List of Chinese administrative divisions by population|22nd in China]]. Its population is mostly [[Han Chinese|Han]], along with [[Hui people|Hui]], [[Dongxiangs|Dongxiang]] and [[Tibetan people|Tibetan]] minorities. The most common language is Mandarin. Gansu is among the poorest administrative divisions in China, [[List of Chinese provincial-level divisions by GDP per capita|ranking last]] in GDP per capita as of 2019.
The [[state of Qin]] originated in what is now southeastern Gansu, and later established the first imperial dynasty in Chinese history. 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 City|Jiayuguan]], the second most populated city in Gansu, is known for its section of the [[Great Wall of China|Great Wall]] and the [[Jiayu Pass]] fortress complex.
==Name==
Gansu is a compound of the names of [[Ganzhou, Zhangye|Ganzhou]] (now the main [[district (PRC)|urban district]] and [[administrative seat|seat]] of [[Zhangye]]) and [[Suzhou, Jiuquan|Suzhou]] (an old name and the modern seat of [[Jiuquan]]), formerly the two most important Chinese settlements in the [[Hexi Corridor]].
Gansu is abbreviated as {{lang|zh|甘}} ({{tlit|zh|Gān}}) or {{lang|zh|陇}} ({{tlit|zh|Lǒng}}), and was also known as [[Longxi Commandery|Longxi]] ({{zhi|s=陇西|l=west of Long}}) or Longyou ({{zhi|s=陇右|l=right of Long}}) prior to early [[Western Han dynasty]], in reference to [[Mount Liupan]] between eastern Gansu and western [[Shaanxi]].{{citation needed|date=March 2014}}
Until 1987, Gansu was rendered in the [[Chinese postal romanization|postal romanization]] and [[Wade-Giles]] as '''Kansu''', which was gradually replaced by pinyin starting in 1958.{{cite news|script-title=zh:陕西为什么拼作Shaanxi,而不是Shanxi |work=The Paper|date=7 July 2016|url=https://www.thepaper.cn/newsDetail_forward_1495089|language=zh}} The spelling of the province is also spelled in [[Mandarin Phonetic Symbols II]] (1986) and [[Tongyong Pinyin]] (2002) adopted by [[Taiwan]], who would later adopt Hanyu Pinyin in 2009.
== History ==
[[File:Summer Vacation 2007, 263, Watchtower In The Morning Light, Dunhuang, Gansu Province.jpg|thumb|250px|The ruins of a [[Han dynasty]] (202 BC – 220 AD) Chinese [[watchtower]] made of [[rammed earth]] at [[Dunhuang]], Gansu province, the eastern edge of the [[Silk Road]]]]
Gansu's name is a [[Compound (linguistics)|compound name]] first used during the [[Song dynasty]]. It is a combination of the names of two prefectures ({{lang|zh|州}}) in the [[Sui dynasty|Sui]] and [[Tang dynasty]]: Gan (around [[Zhangye]]) and Su (around [[Jiuquan]]). Its eastern part forms part of one of the cradles of ancient Chinese civilisation.
=== Ancient Gansu ===
In prehistoric times, Gansu was host to [[Neolithic]] cultures. The [[Dadiwan culture]], from where archaeologically significant [[Artifact (archaeology)|artifact]]s have been excavated, flourished in the eastern end of Gansu from about 6000{{nbsp}}BC to about 3000{{nbsp}}BC.{{cite web|url=http://www.china.org.cn/english/2002/Nov/48266.htm|url-status=live|title=Dadiwan Relics Break Archeological Records|last=Lin |first=Chen |date=8 November 2002|publisher={{lang|zh-Hans|中国网}}|archive-date=2003-07-19|archive-url=https://web.archive.org/web/20030719182734/http://www.china.org.cn/english/2002/Nov/48266.htm}} The [[Majiayao culture]] and part of the [[Qijia culture]] took root in Gansu from 3100 BC to 2700 BC and 2400 BC to 1900 BC respectively.
The [[Yuezhi]] originally lived in the very western part of Gansu until they were forced to emigrate by the [[Xiongnu]] around 177 BC.
The [[Qin (state)|State of Qin]], known in China as the [[Qin dynasty|founding state]] of the [[Early Imperial China|Chinese empire]], grew out from the southeastern part of Gansu, specifically the [[Tianshui]] area. The Qin name is believed to have originated, in part, from the area.[http://news.xinhuanet.com/english/2006-11/19/content_5349258.htm Xinhua – English] {{webarchive|url=https://web.archive.org/web/20120305230318/http://news.xinhuanet.com/english/2006-11/19/content_5349258.htm |date=5 March 2012 }}{{Cite web |url=http://en.people.cn/200602/20/eng20060220_244270.html |title=People's Daily Online – Chinese surname history: Qin |access-date=22 February 2016 |archive-date=3 March 2016 |archive-url=https://web.archive.org/web/20160303192740/http://en.people.cn/200602/20/eng20060220_244270.html |url-status=dead }} Qin tombs and artifacts have been excavated from [[Fangmatan]] near Tianshui, including one 2200-year-old map of [[Guixian County]].[http://news.xinhuanet.com/english/2002-04/30/content_378835.htm Over 2,200-Year-old Map Discovered in NW China] {{webarchive|url=https://web.archive.org/web/20070312011236/http://news.xinhuanet.com/english/2002-04/30/content_378835.htm |date=12 March 2007 }}
===Imperial era===
[[File:Chinese jar, Neolithic period, painted earthenware, HAA.JPG|thumb|left|[[Xindian culture]] era jar with two lug handles uncovered in Gansu, dating to around 1,000 BC]] [[File:Yumenguan.jpg|left|250px|thumb|The ruins of a gate at [[Yumen Pass]], built during the [[Jin dynasty (266–420)]]]]
In imperial times, Gansu was an important strategic outpost and communications link for the Chinese empire, as the [[Hexi Corridor]] runs along the "neck" of the province. The [[Han dynasty]] extended the [[History of the Great Wall of China|Great Wall]] across this corridor, building the strategic [[Yumenguan]] (Jade Gate Pass, near [[Dunhuang]]) and [[Yangguan]] fort towns along it. Remains of the wall and the towns can be found there. The [[Ming dynasty]] built the [[Jiayuguan (pass)|Jiayuguan]] outpost in Gansu. To the west of Yumenguan and the [[Qilian Mountains]], at the northwestern end of the province, the [[Yuezhi]], [[Wusun]], and other [[nomad]]ic tribes dwelt ([[Shiji]] 123), occasionally figuring in regional imperial Chinese [[geopolitics]].
By the Qingshui treaty, concluded in 823 between the [[Tibetan Empire]] and the Tang dynasty, China lost much of western Gansu province for a significant period.Turghun Almas, "Uygurlar", Kashgar, 1989.
After the fall of the [[Uyghur Khaganate]], a Buddhist [[Yugur people|Yugur]] (Uyghur) state called the [[Ganzhou Uyghur Kingdom]] was established by migrating Uyghurs from the khaganate in part of Gansu that lasted from 848 to 1036{{nbsp}}AD.
Along the [[Silk Road]], Gansu was an economically important province, as well as a cultural transmission path. Temples and [[Buddhist]] [[grotto]]es[http://en.people.cn/200201/03/eng20020103_87985.shtml English.people.com.cn] such as those at [[Mogao Caves]] ('Caves of the Thousand Buddhas') and [[Maijishan Caves]] contain artistically and historically revealing [[mural]]s."Artistic treasures of Maiji Mountain caves" by Alok Shrotriya and Zhou Xue-ying. [http://www.asianart.com/articles/alok/index.html Asianart.com] An early form of paper inscribed with [[Chinese writing|Chinese characters]] and dating to about 8{{nbsp}}BC was discovered at the site of a Western Han [[garrison]] near the Yumen pass in August 2006.[https://web.archive.org/web/20080328142706/http://news.xinhuanet.com/english/2006-08/08/content_4937457.htm Xinhuanet.com ]
The Xixia or [[Western Xia]] dynasty controlled much of Gansu as well as [[Ningxia]].
The province was also the origin of the [[Dungan Revolt (1862–77)|Dungan Revolt]] of 1862–77. Among the [[Qing dynasty|Qing]] forces were Muslim generals, including [[Ma Zhan'ao]] and [[Ma Anliang]], who helped the Qing crush the rebel Muslims. The revolt had spread into Gansu from neighbouring Qinghai.
There was another [[Dungan revolt (1895–1896)|Dungan revolt from 1895 to 1896]].
[[File:JiayuguanFort.jpg|thumb|right|250px|[[Jiayuguan Pass|Jiayuguan]] Fort]]
===Republican China===
As a result of frequent earthquakes, droughts and famines, the economic progress of Gansu was significantly slower than that of other provinces of China until recently. Based on the area's abundant mineral resources it has begun developing into a vital industrial center. An [[1920 Haiyuan earthquake|earthquake in Gansu]] at 8.6 on the [[Richter magnitude scale|Richter scale]] killed around 180,000 people mostly in the present-day area of [[Ningxia]] in 1920, and [[1932 Changma earthquake|another with a magnitude of 7.6]] killed 275 in 1932.{{cite web|url=https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/3507|title=Significant Earthquake Information|last=National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information|year=1972 |publisher=NOAA National Centers for Environmental Information|doi=10.7289/V5TD9V7K}}
The [[Muslim Conflict in Gansu (1927–1930)]] was a conflict against the [[Guominjun]].
While the Muslim General [[Ma Hongbin]] was acting chairman of the province, Muslim General [[Ma Buqing]] was in virtual control of Gansu in 1940. Liangzhou District in [[Wuwei, Gansu|Wuwei]] was previously his headquarters in Gansu, where he controlled 15 million Muslims.{{cite news |title=Moslem War Lord Isolated by China; Ma Pu-ching Sent to Swamps of Tibet With the Title of Reclamation Commissioner Member of a Noted Clan Vital Route to Russia Passes Through Area With 15,000,000 Believers in the Koran|last=Forman |first=Harrison |newspaper=The New York Times|date=19 July 1942|url=https://query.nytimes.com/gst/abstract.html?res=9E05E5DF1E3EE531A1575AC1A9619C946393D6CF}} [[Xinjiang]] came under [[Kuomintang]] (Nationalist) control after their soldiers entered via Gansu.{{cite book|last=Lin |first=Hsiao-ting |title=Modern China's Ethnic Frontiers: A Journey to the West|url=https://books.google.com/books?id=N8YtCgAAQBAJ&pg=PA76|date=13 September 2010|publisher=[[Routledge]]|isbn=978-1-136-92393-7|pages=76–}} Gansu's [[Tianshui|Tienshui]] was the site of a Japanese-Chinese warplane fight.{{cite book|last=Armstrong |first=Alan |title=Preemptive Strike: The Secret Plan that Would Have Prevented the Attack on Pearl Harbor|url=https://archive.org/details/preemptivestrike00alan|url-access=registration|quote=airfield kansu.|year=2006|publisher=Lyons Press|isbn=978-1-59228-913-4|pages=[https://archive.org/details/preemptivestrike00alan/page/122 122]–}}
Gansu was vulnerable to Soviet penetration via Xinjiang.{{cite book|last=Fleming |first=Peter |title=News from Tartary: An Epic Journey Across Central Asia|url=https://books.google.com/books?id=dg-9BAAAQBAJ&pg=PA264|date=19 August 2014|publisher=I.B.Tauris|isbn=978-0-85773-495-2|pages=264–}} Gansu was a passageway for [[Sino-Soviet Non-Aggression Pact|Soviet war supplies for the Republic of China]] during the [[Second Sino-Japanese War]].{{cite book|author=Andrew D. W. Forbes|title=Warlords and Muslims in Chinese Central Asia: A Political History of Republican Sinkiang 1911–1949|url=https://books.google.com/books?id=IAs9AAAAIAAJ&q=airfield+kansu&pg=PA146|date=9 October 1986|publisher=CUP Archive|isbn=978-0-521-25514-1|pages=146–}} Lanzhou was a destination point via a road coming from [[Dihua]] (Ürümqi).{{cite book|last=Kataoka |first=Tetsuya |title=Resistance and Revolution in China: The Communists and the Second United Front|url=https://archive.org/details/resistancerevolu00kata|url-access=registration|quote=airfield kansu.|year=1974|publisher=University of California Press|isbn=978-0-520-02553-0|pages=[https://archive.org/details/resistancerevolu00kata/page/170 170]–}} The [[Gongxingdun Airport|Gonxingdun Aerodrome]] was one of several air bases where the [[Development of Chinese Nationalist air force (1937–1945)|Chinese Air Force]] operated in defense of Gansu. Gansu provided wartime China with most of the locally [[Petroleum industry|sourced petrol]] from the [[Yumen City#Economy|Yumen Laojunmiao oil wells]] beginning in the summer of 1939, producing 250,000 tons of [[Petroleum|crude oil]] in those war years.{{cite web |last1={{lang|zh-Hans|地球知识局}} |first1={{lang|zh-Hans|行业观察}} |script-title=zh:新中国第一座石油工业城市已落幕?|url=http://www.oilsns.com/article/303845|website=OILSNS|access-date=2021-02-13|location=China|date=9 April 2018 |quote=With the exploration efforts of Sun Jianchu, Yan Shuang and other patriotic scholars, on August 11, 1939, the Laojunmiao oil well blew out the first oil. This moment has also become the starting point of China's petroleum industry. During the Anti-Fascist War against the Imperial Japanese forces, the Yumen oil wells produced a total of 250,000 tons of crude oil, accounting for more than 90% of the country's crude oil output during the same period, making an important contribution to the victory toward the Anti-Fascist War.}} Lanzhou and [[Lhasa]] were designated to be recipients of a new railway.{{when|date=July 2017}}{{cite book|author=Ginsburgs|title=Communist China and Tibet: The First Dozen Years|url=https://books.google.com/books?id=F-yjBwAAQBAJ&q=airfield+kansu&pg=PA100|date=11 November 2013|publisher=Springer Science & Business Media|isbn=978-94-017-5057-8|pages=100–}}
The [[Kuomintang Islamic insurgency in China (1950–1958)]] was a prolongation of the [[Chinese Civil War]] in several provinces including Gansu.
== Geography ==
Gansu has an area of {{convert|454000|km2}}, and the vast majority of its land is more than {{convert|1000|m}} above [[sea level]]. It lies between the [[Tibetan Plateau]] and the [[Loess Plateau]], bordering [[Mongolia]] ([[Govi-Altai Province]]) to the northwest, [[Inner Mongolia]] and [[Ningxia]] to the north, [[Shaanxi]] to the east, [[Sichuan]] to the south, and [[Xinjiang]] to the west. The [[Yellow River]] passes through the southern part of the province. The province contains the [[geographical centre]] of China, marked by the Center of the Country Monument at {{coord|35|50|40.9|N|103|27|7.5|E|region:CN-62_type:landmark|name=Geographical centre of China}}.[http://en.people.cn/english/200009/13/eng20000913_50419.html English.people.com.cn]
Part of the [[Gobi Desert]] is located in Gansu, as well as small parts of the [[Badain Jaran Desert]] and the [[Tengger Desert]].
The Yellow River gets most of its water from Gansu, flowing straight through Lanzhou. The area around Wuwei is part of [[Shiyang River Basin]].{{cite web|url=http://www.futurewater.nl/gmep/shiyang/general |access-date=15 June 2009 |author=FutureWater |title=Groundwater Management Exploration Package |location=# [[Wageningen]], Netherlands |url-status=dead |archive-url=https://web.archive.org/web/20110724152308/http://www.futurewater.nl/gmep/shiyang/general |archive-date=24 July 2011 }}
The landscape in Gansu is very mountainous in the south and flat in the north. The mountains in the south are part of the [[Qilian Mountains]], while the far western [[Altyn-Tagh]] contains the province's highest point, at {{convert|5830|m|ft|-1}}.
A natural land passage known as [[Hexi Corridor]], stretching some {{convert|1000|km}} from Lanzhou to the [[Yumen Pass|Jade Gate]], is situated within the province. It is bounded by the Gobi Desert to the north and the Qilian Mountains from the south.
[[File:Koppen-Geiger Map v2 CHN Gansu 1991–2020.svg|alt=Köppen–Geiger climate classification map at 1-km resolution for Gansu (China) for 1991–2020|thumb|[[Köppen–Geiger climate classification]] map of Gansu]]
Gansu generally has a semi-arid to arid continental climate ([[Köppen climate classification|Köppen]] ''BSk'' or ''BWk'') with warm to hot summers and cold to very cold winters, although [[diurnal temperature range]]s are often so large that maxima remain above {{convert|0|C|F}} even in winter. However, due to extreme altitude, some areas of Gansu exhibit a [[subarctic climate]] (''Dwc'') – with winter temperatures sometimes dropping to {{convert|-40|C|F}}. Most of the limited precipitation is delivered in the summer months. Winters are so dry that snow cover is confined to very high altitudes and the [[snow line]] can be as high as {{convert|5500|m|ft|-1}} in the southwest.