High Quality Content by WIKIPEDIA articles! The Shenyang J-11 (JianJi-11) is a 4th-generation fighter in the People's Liberation Army Air Force (4.5 generation or advanced 4th generation for J-11B versions). The base J-11 is a licensed produced Russian Sukhoi Su-27 SK air-superiority fighter built by Shenyang Aircraft Corporation (SAC), with a contract of 200 being issued in 1995 contract. The new J-11 is a Chinese version of the Sukhoi Su-27SK air superiority fighter. Sukhoi originally provided kits to Shenyang Aircraft Corporation upon an agreement in 1995, but over time there were to be increasing Chinese content in the aircraft, with up to 70% of all Su-27 ordered by the PLAAF to be Chinese-made. It has been reported that Sukhoi agreed to an upgrade program, allegedly in 2001, with improved radar and attack avionics. However, in 2004, Russian media reported that Shenyang co-production of the basic J-11 was stopped after around 100 examples were built. The PLAAF later revealeda mock-up of an upgraded multirole version of the J-11 in mid-2002.