There are a total of three Blue-Army Aggressor squadrons under the PLAAF orbat; the other two are equipped with J-10A (60x8x) and J-7E (15xxx) to simulate lighter, single engine, opponents. These squadrons operate under the PLAAF Flight Test & Training Base (FT&TB) at Cangzhou Airbase in Hebei.
The first PLAAF aggressor squadron was commissioned in June 1987 (here) and was modeled after the US "Top Gun" and "Red Flag" schools. It has been serving as a grindstone for sharpening pilot combat skills ever since. Yup, they are putting their skills acquired from the Moscow Pilot School to good use. (here)
Su-30MKK (61x8x) Aggressor Squadron
J-10A (60x8x) Aggressor Squadron