The Chengdu J-20 (Jian-20; ) is a fifth-generation, stealth, twin-engine fighter aircraft prototype being developed by the Chengdu Aircraft Industry Group for the Chinese People's Liberation Army Air Force (PLAAF). 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 PLAAF designates the J-20 as "Project 718". The general designer of the aircraft is reportedly Yang Wei, who was the general designer of CAC/PAC JF-17 Thunder.