Sept 14, 2015 defense-aerospace.com
(Source: Alert5 blog; posted Sept 13, 2015)
The Shenyang J-11BS fighter made its first public flying demonstration during the Air Force public day in Changchun, Jiling province on Sept. 11. The J-11BS is the two-seat indigenous copy of the Su-27. The aircraft is powered by the WS-10 engine.