Nearly 100 fighters from Chinese Air Force participate in an air combat drill in the desert areas in northwest China. The drill aims at examining the training level of Chinese Air Force and discovering problems in the training. Photo: weibo.com

Nearly 100 fighters from Chinese Air Force participate in an air combat drill in the desert areas in northwest China. The drill aims at examining the training level of Chinese Air Force and discovering problems in the training. Photo: weibo.com

Nearly 100 fighters from Chinese Air Force participate in an air combat drill in the desert areas in northwest China. The drill aims at examining the training level of Chinese Air Force and discovering problems in the training. Photo: weibo.com

Nearly 100 fighters from Chinese Air Force participate in an air combat drill in the desert areas in northwest China. The drill aims at examining the training level of Chinese Air Force and discovering problems in the training. Photo: weibo.com