Shenyang J-11 is a Chinese-built multirole fighter aircraft developed by the Shenyang Aircraft Corporation. It is the Chinese-built version of the Russian Sukhoi Su-27, and is one of the most advanced fighter jets in the Chinese Air Force
From Wikipedia
The Shenyang J-11, also known as Yinglong is a 4th generation twin-engine jet fighter of the People's Republic of China derived from the Soviet-designed Sukhoi Su-27SK. It is manufactured by the Shenyang Aircraft Corporation (SAC). The aircraft is operated by the People's Liberation Army Air Force (PLAAF) and the People's Liberation Army Naval Air Force (PLANAF).