On May 21st, the "brush palm" ride service of Beijing Rail Transit Daxing Airport Line was officially launched. Passengers can register and activate the "swipe palm" ride service to pass through the gates of the subway line. It is reported that the "brush palm" switch belongs to non-contact switch, which is hygienic and safe. Even if passengers encounter special situations such as forgetting to bring their physical card or running out of battery on their phones, they can still take the subway. (New News Agency)