Besides of the J-11 fighter fleets, Chinese Air Force has begun to deploy its home-made J-10 fighters on the air bases, which locate on the high-land area. These images of J-10 fighters and Z-8 helicopter are perhaps pictured near an air field on Tibet plateau.
And the Z-8 in the photo is probably the AC313, China's first independently developed civilian medium-lift helicopter. AC313 is a 13.8t helicopter with a carrying capacity of 27 passengers or 15 wounded with stretchers. The maximum range is 900km (ca. 559 miles). China once announced that AC-313 is the first indigenous copter to fly on high-altitude area excpet U.S. Black-Hawk.