j-20a

Flight testing began with prototypes in late 2010, with maiden flight in 2011. The variant entered serial production in October 2017. J-20 was incorporated into training units of the People's Liberation Army Air Force in March 2017 and combat units in February 2018. Initially, this variant was dubbed J-20A by analysts, while the later model with WS-15 engine was dubbed J-20B.