7th China Helicopter Exposition to be held from Oct. 16 to 19 in Tianjin
Frigates sail in formation
Submarine conducts combat training
MBTs maneuver towards designated battlefield
J-15 fighter jets in training
Air defense missile systems fire in training
Heavy artillery spits fire at targets
Military vehicles maneuver in valley
Howitzer fires at mock targets
Frigates steam in training
Artillery element conducts live-fire assessment
J-10 fighter jets participate in flight training
J-15 jets in flight training
Aircraft in Changchun Air Show
