BEIJING, Oct. 20 -- From the security patrols in the East China Sea Air Defense Identification Zone (ADIZ) carried out by the J-20 fighter jets, to the flight tracks covering Asia, Africa, Europe and Oceania by the Y-20 transport aircraft, and to the debut of the YY-20 large aerial refueling aircraft, the Chinese People's Liberation Army Air Force (PLAAF) has accelerated its strategic transformation in the past decade, continuously improving its capabilities to safeguard China’s national air and space security and strategic interests.
