Z-10 attack helicopters and Z-20 utility helicopters attached to the Chinese PLA Army's Thunder Aerobatic Team fly in arrow formation during the 7th China Helicopter Exposition . (eng.chinamil.com.cn/Photo by Luan Cheng)
Z-10 attack helicopters and Z-20 utility helicopters attached to the Chinese PLA Army's Thunder Aerobatic Team fly in arrow formation during the 7th China Helicopter Exposition . (eng.chinamil.com.cn/Photo by Luan Cheng)