The Wei River (Simplified Chinese:渭河; pinyin: Wei He; Wade-Giles: Wei Ho) is a river in west-central China and is the largest tributary of the Yellow River. Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use Wade-Giles (ˌweɪdˈʤaɪlz) sometimes abbreviated Wade, is a Romanization system (phonetic notation and Transcription) for the Mandarin "Riverine" redirects here For the use of that term in Maritime geography, see there China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National A tributary is a Stream or River which flows into a mainstem (or parent river The Yellow River or Huang He / Hwang Ho ( Hatan Gol Queen river) is the second-longest river in China (after the Yangtze River) and the The source of the Wei River is close to Weiyuan County in Gansu province. ( is a province located in the northwest of the People's Republic of China. Weiyuan (渭源) literally means "Wei's source". At its source, it is less than 200 kilometres from the Yellow River at Lanzhou. Lanzhou ( Postal map spelling: Lanchow is a Prefecture-level city and capital of Gansu province in northwestern China. However, due to the sharp turn north the Yellow River takes in Lanzhou, the Wei and the Yellow Rivers do not meet for more than 2000 km further along the Yellow River's course. In a direct line, its source lies 700 kilometres west of the main city along its course, Xi'an in the Shaanxi province. UserEl_C --> Xi'an ( Postal map spelling: Sian is the Capital of the Shaanxi province in the ( Postal map spelling: Shensi) is a north-central province of the People's Republic of China, and includes portions of the Loess The length of the river is 818 kilometres and the area drained covers 135. 000 km² Its valley was one of the early cradles of Chinese civilisation, along which the capitals of the Qin, (Xianyang), Han and Tang Dynasties were situated. Not to be confused with the Qing Dynasty, the last dynasty of China This article is related to a city for the airport located in the city see Xi'an Xianyang International Airport Xianyang ( Sienyang Hsienyang The Han Dynasty ( 206 BC–220 AD followed the Qin Dynasty and preceded the Three Kingdoms in China. The Tang Dynasty ( Middle Chinese: dhɑng (June 18 618&ndashJune 4 907 was an imperial dynasty of China preceded by the Sui Dynasty and followed by The area in Dingxi City, Gansu Province, around its headwaters, has numerous stone age sites from various early cultures. Dingxi ( Simplified Chinese: 定西 Pinyin: Dìngxī is a Prefecture-level city in China 's Gansu province The Stone Age is a broad prehistoric time period during which Humans widely used stone for toolmaking In September of 2003 extensive rainfall led to flooding that caused over 30 fatalities, and temporarily displaced over 300,000 persons.  Ecological aspects of the Wei River have been examined with respect to flow rates in the Wei River. 
The headwaters of the Wei River are notable in the ancient history of the Northern Silk Road, one of four "Silk Roads" of antiquity. The Northern Silk Road is a Prehistoric Trackway in northern China originating in the early capital of Xi'an and extending north of the According to C. Michael Hogan, the Chinese segment of the Northern Silk Road is "the northernmost route of some 2600 kilometres, which connects the ancient Chinese capital of Xian to the west via the Chinese cities of Baoji, Tianshui (at the headwater gorges of the Wei River), Lanzhou, Dunhuang, over the Wushao Ling Pass to Wuwei and emerging in Kashgar, China before linking to ancient Parthia. This route traverses the provinces of Shaanxi and Gansu as well as the Xinjiang Uyghur Autonomous Region. This most northern of the Silk Roads is characterised by its looping north of the Taklamakan Desert. The Silk Road, or Silk Routes, are an extensive interconnected network of Trade routes across the Asian continent connecting East South and Western Asia with the "
The Wei Valley is likely the earliest center of Chinese civilisation, and also the location of China's first major irrigation works.