ISLAMABAD - A Joint Air exercise Shaheen IV between Pakistan Air force (PAF) and PLA Air force, concluded at Yinchuan Airbase, China on Saturday. The closing ceremony of the exercise was attended by Air Vice Marshal Mujahid Anwar Khan, Deputy Chief of Air Staff (Operations) Pakistan Air Force and Lt Gen Zheng Qun Liang, Deputy Commander PLA Air Force. The exercise was aimed at enhancing bilateral relationship and defence cooperation between both countries. It was the fourth exercise of Shaheen series which commenced on Sep 12, 2015.