The Yangtze River, Yangzi River or Chang Jiang is the longest river in China and the third-longest river in the world. It rises at Jari Hill in the Tanggula Mountains of the Tibetan Plateau and flows for 6,236 kilometers (3,875 mi), including the Dam Qu River, the longest source of the Yangtze, in a generally easterly direction to the East China Sea. It is the fifth-largest primary river by discharge volume in the world. Its drainage basin comprises one-fifth of the land area of China, and is home to nearly one-third of the country's population.
The Yangtze has played a major role in the history, culture, and economy of China. For thousands of years, the river has been used for water, irrigation, sanitation, transportation, industry, boundary-marking, and war. The Yangtze Delta generates as much as 20% of China's GDP, and the Three Gorges Dam on the Yangtze is the largest hydro-electric power station in the world. In mid-2014, the Chinese government announced it was building a multi-tier transport network, comprising railways, roads and airports to create a new economic belt alongside the river.
The Yangtze flows through a wide array of ecosystems and is a habitat for several endemic and threatened species, including the Chinese alligator and the narrow-ridged finless porpoise, and was also the home of the now extinct Yangtze river dolphin (or baiji) and Chinese paddlefish, as well as the Yangtze sturgeon, which is extinct in the wild. In recent years, the river has suffered from industrial pollution, plastic pollution, agricultural runoff, siltation, and loss of wetland and lakes, which exacerbates seasonal flooding. Some sections of the river are now protected as nature reserves. A stretch of the upstream Yangtze flowing through deep gorges in western Yunnan is part of the Three Parallel Rivers of Yunnan Protected Areas, a UNESCO World Heritage Site.
Cháng Jiāng (长江; 長江), meaning "Long River", is the name for the river in Chinese. However, the Chinese have given different names to sections of the river (it is from an ancient name to only a part of the river that the modern English name derives – see below).
In Old Chinese, the Yangtze was simply called Jiang/Kiang 江, a character of phono-semantic compound origin, combining the water radical 氵 with the homophone 工 (now pronounced gōng, but *kˤoŋ in Old Chinese). Kong was probably a word in the Austroasiatic language of local peoples such as the Yue. Similar to *krong in Proto-Vietnamese and krung in Mon, all meaning "river", it is related to modern Vietnamese sông (river) and Khmer krung (city on riverside), whence Thai krung (กรุง capital city), not kôngkea (water) which is from the Sanskrit root gáṅgā.
By the Han dynasty, Jiāng had come to mean any river in Chinese, and this river was distinguished as the "Great River" 大江 (Dàjiāng). The epithet 長 (simplified version 长), meaning "long", was first formally applied to the river during the Six Dynasties period.
Various sections of the Yangtze have local names. From Yibin to Yichang, the river through Sichuan and Chongqing Municipality is also known as the Chuān Jiāng (川江) or "Sichuan River". In Hubei, the river is also called the Jīng Jiāng (荆江; 荊江) or the "Jing River" after Jingzhou, one of the Nine Provinces of ancient China. In Anhui, the river takes on the local name Wǎn Jiāng after the shorthand name for Anhui, wǎn (皖). Jinsha ("Gold Sands") River refers to the 2,308 km (1,434 mi) of the Yangtze from Yibin upstream to the confluence with the Batang River near Yushu in Qinghai, while the Tongtian ("Leading to Heaven") River describes the 813 km (505 mi) section from Yushu up to the confluence of the Tuotuo River and the Dangqu River.
Yángzǐ Jiāng (揚子江; 扬子江) or the "Yangzi River", from which the English name Yangtze is derived, is the local name for the Lower Yangtze in the region of Yangzhou. The name likely comes from an ancient ferry crossing called Yángzǐ or Yángzǐjīn (揚子 / 揚子津). Europeans who arrived in the Yangtze River Delta region applied this local name to the whole river.
In the West, the river was called Quian (江) and Quianshui (江水) by Marco Polo, and appeared on the earliest English maps as Kian or Kiam. By the mid-19th century, these romanizations had standardized as Kiang.
A related form also popularized in English was "Kian-ku," also spelled "Keeang-Koo" and "Kyang Kew", derived from mistaking the Chinese term for the mouth of the Yangtze (江口, Jiāngkǒu) as the name of the river itself.
The name Blue River began to be applied in the 18th century, apparently owing to a former name of the Dam Chu or Min and to analogy with the Yellow River, but it was frequently explained in early English references as a 'translation' of Jiang, Jiangkou, or Yangzijiang. Very common in 18th- and 19th-century sources, the name fell out of favor due to growing awareness of its lack of any connection to the river's Chinese names and to the irony of its application to such a muddy waterway.
Matteo Ricci's 1615 Latin account De Christiana expeditione apud Sinas included descriptions of the "Iansu" and "Iansuchian." The posthumous account's translation of the name as Fils de la Mer ("Son of the Ocean") shows that Ricci, who by the end of his life was fluent in literary Chinese, was introduced to it as the homophonic 洋子江 rather than the usual 揚子江. Further, although railroads and the Shanghai concessions subsequently turned it into a backwater, Yangzhou was the lower river's principal port for much of the Qing dynasty, directing Liangjiang's important salt monopoly and connecting the Yangtze with the Grand Canal to Beijing. (That connection also made it one of the Yellow River's principal ports between the floods of 1344 and the 1850s, during which time the Yellow River ran well south of Shandong and discharged into the ocean a mere few hundred kilometers from the mouth of the Yangtze.)
Yángzǐ Jiāng (揚子江; 扬子江), or the "Yangzi River", from which the English name Yangtze is derived, is the local name for the Lower Yangtze in the region of Yangzhou (see above). Europeans who arrived in the Yangtze River Delta region applied this local name to the whole river.
By 1800, English cartographers such as Aaron Arrowsmith had adopted the French style of the name as Yang-tse or Yang-tse Kiang. The British diplomat Thomas Wade emended this to Yang-tzu Chiang as part of his formerly popular romanization of Chinese, based on the Beijing dialect instead of Nanjing's and first published in 1867. The spellings Yangtze and Yangtze Kiang was a compromise between the two methods adopted at the 1906 Imperial Postal Conference in Shanghai, which established postal romanization. Hanyu Pinyin was adopted by the PRC's First Congress in 1958, but it was not widely employed in English outside mainland China prior to the normalization of diplomatic relations between the United States and the PRC in 1979; since that time, the spelling Yangzi has also been used.
The source and upper reaches of the Yangtze are located in ethnic Tibetan areas of Qinghai. In Tibetan, the Tuotuo headwaters are the Machu (Tibetan: རྨ་ཆུ་, Wylie: rma-chu, lit. "Red Water"). The Tongtian is the Drichu (འབྲི་ཆུ་ , 'Bri Chu'), literally "Water of the Female Yak"; transliterated into Chinese: 直曲; pinyin: Zhíqū).
The river originates from several tributaries in the eastern part of the Tibetan Plateau, two of which are commonly referred to as the "source." Traditionally, the Chinese government has recognized the source as the Tuotuo tributary at the base of a glacier lying on the west of Geladandong Mountain in the Tanggula Mountains. This source is found at 33°25′44″N 91°10′57″E and while not the furthest source of the Yangtze, it is the highest source at 5,342 meters (17,526 ft) above sea level. The true source of the Yangtze, hydrologically the longest river distance from the sea, is at Jari Hill at the head of the Dam Qu tributary, approximately 365 kilometers (227 mi) southeast of Geladandong. This source was only discovered in the late 20th century and lies in wetlands at 32°36′14″N 94°30′44″E and 5,170 meters (16,960 ft) above sea level just southeast of Chadan Township in Zadoi County, Yushu Prefecture, Qinghai. As the historical spiritual source of the Yangtze, the Geladandong source is still commonly referred to as the source of the Yangtze since the discovery of the Jari Hill source.