A static model of Jueying-8 unmanned helicopter developed by AVIC China Helicopter Research and Development Institute is put on display at the second China Helicopter Exposition in Tianjin, which opened on Thursday Sept. 5. More than 40 helicopters are being exhibited in the four-day expo, during which China’s attack helicopters WZ-10, WZ-19 and Z-9 will perform aerobatic shows. The expo also marks the debut of the models of Jueying-8 unmanned helicopter and a Blue Whale tilt-rotor aircraft, which has been nicknamed China's Osprey. [Photo/people.com.cn]