J-10 fighter jets attached to the Chinese PLA Air Force Bayi Aerobatic Team fly in a tight formation at low altitude through a valley over the Huangyaguan section of the Great Wall in Tianjin, north China, on the morning of November 6, 2026, in celebration of the 77th anniversary of the PLA Air Force. (eng.chinamil.com.cn/Photo by Mu Ruilin)