J-11 (English name: J11, NATO code name: Shenyang J11 or F11) is a single-seater dual-purpose heavy jet fighter of the Chinese Air Force. It is a domestic assembled aircraft purchased by China for Soviet / Russian patents and authorized Su-27SK fighters, and is one of the third generation fighter aircraft in China. The J-11 inherits the excellent characteristics of Su-27. With the replacement aerodynamics shape, engine performance, high fuel carrying capacity, wide flight altitude and speed range, the J-11 can intercept air targets very efficiently. It can not only use missiles to carry out long-range attacks, but also gain the upper hand in close-range air combat.