The Chengdu J-20 (Jian-20; simplified Chinese: 歼-二零; traditional Chinese: 殲-二零; pinyin: Jiān èr líng) is a purportedfifth-generation, stealth, twin-engine fighter aircraft prototype developed by Chengdu Aircraft Industry Group for the Chinese People's Liberation Army Air Force (PLAAF). In late 2010, the J-20 underwent high speed taxiing tests. The J-20 made its first flight on 11 January 2011. General He Weirong, Deputy Commander of the People's Liberation Army Air Force said in November 2009 that he expected the J-20 to be operational in 2017–2019.

The J-20 was one of the stealth fighter programs under the codename J-XX that was launched in the late 1990s. It was designated “Project 718”, and won the PLAAF endorsement in a 2008 competition against a Shenyang proposal that was reportedly even larger than J-20. Two prototypes (#2001-01 & #2001–02) have been built as of the end of 2010.

On 22 December 2010, the J-20 was under-going high speed taxiing tests outside the Chengdu Aircraft Design Institute with no confirmed flight tests. The J-20 made its first flight, which lasted about 15 minutes, on 11 January 2011.

Coordinates: 30°39′35″N 104°03′48″E / 30.65972°N 104.06333°E / 30.65972; 104.06333

Chengdu (Chinese: 成都; Sichuanese: Cen²du¹; pinyin: Chéngdū), formerly transliterated Chengtu, is the capital of Sichuan province in Southwest China. It holds sub-provincial administrative status. The urban area houses 14,047,625 inhabitants: 7,123,697 within the municipality's nine districts and 6,730,749 in the surrounding region.

Chengdu is one of the most important economic, transportation, and communication centers in Western China. According to the 2007 Public Appraisal for Best Chinese Cities for Investment, Chengdu was chosen as one of the top ten cities to invest in out of a total of 280 urban centers in China. It was recently named China's 4th-most livable city by China Daily.

The fertile Chengdu Plain, on which Chengdu is located, is also known as the "Country of Heaven" (天府之国, Tiānfǔzhiguó), a phrase also often translated as "The Land of Abundance". The discovery of the Jinsha site suggests the area of Chengdu had become the center of the bronze age Sanxingdui culture around the time of the establishment of the state of Shu, prior to its annexation by Qin in 316 BC.

J20 or J-20 may refer to: