Photo taken on Aug. 27, 2019 shows models of unmanned aircrafts displayed at the International Aviation and Space Salon MAKS-2019 in Zhukovsky, Russia. The Chinese pavilion at the International Aviation and Space Salon MAKS-2019 opened here on Tuesday, as the latest aviation developments of leading Chinese enterprises, including the results of China-Russia cooperation, made their debut at the exhibition. (Xinhua/Bai Xueqi)