Spectators take photos of aircraft in flight performance during the 2025 aviation open-day activities of the Chinese PLA Air Force and Changchun Air Show in Changchun City, northeast China's Jilin Province, on September 21, 2025. (eng.chinamil.com.cn/Photo by Yu Hongchun)9月21日，2025空军航空开放活动和长春航空展继续进行。图为航空展掠影。（英文中国军网/余红春 摄）