Three large, very fresh ramps - with little fuel/oil staining. 23 Fighters. Comments on types welcome. A GE community layer mentions J-10's; but I don't see any canards in the slightly blurry imagery. A fenced compound with two rows of hatches may be missile defense system.
http://www.globalsecurity.org/military/world/china/19fd.htm
19th Fighter Division
The 19th Fighter Division was established in November 1951. The division is believed to be comprised of the 55th, 56th and 57th Regiments.
The division is currently located at the Zhengzhou Airbase and flies the Su-27 and the J-7 aircraft.