Photo taken on Dec. 4, 2018 shows the HUD (Head Up Display) information displayed on the verification flight. The Civil Aviation Administration of China (CAAC) on Tuesday made the first verification takeoff based on the Head Up Display (HUD) under Runway Visual Range (RVR) of 90-meter low visibility. The success of the takeoff symbolized that 80 percent of difficulties relating to the low-visibility takeoff will be solved, which can further guarantee the regularity of the flights. (Xinhua/Xing Guangli)