A J-11 regiment of the PLA Air Force conducts night combat training in Tibet on Aug. 9, 2015.

　　LHASA, August 11 (ChinaMil) -- A J-11 regiment of the PLA Air Force kicked off its night combat training in Tibet on Aug. 9.

　　At a high plateau military airfield surrounded by snow-clad mountains, groups of J-11 heavy fighters were seen taking off amid twilight on Sunday evening. They were to engage in a confrontation drill in the black sky.

　　The regiment pays much attention to the training of air battle at night, which has become a routine training program in its annual training plan.

　　To enhance the combat capability of the air force, China began to make J-11 heavy fighters by introducing from Russia the production line of Su-27 heavy fighter in 1990s. Since 2002, the China-made J-11 heavy fighters have been among the arrays of warplanes of the PLA Air Force. The J-11 and J-11A heavy fighters are now widely serving in the aviation troop units of the Air Force and the Navy of the PLA.