What kind of credit card system will be installed in the elevators of our residential property recently? I want to ask what's going on, is it safe?

Has little to do with elevator safety.

This card swiping system is mainly used to control elevator doors. Don't open the door without swiping the card (you can also control the door inside the elevator from the outside).

One of the purposes of this credit card is to guarantee the property fee. If you don't pay, the ic card is not authorized, and you can't take the elevator (the residents at the bottom say there is no pressure)

Another purpose is safety. Non-residential residents can't take the elevator, they have to take the stairs, and most of them will be monitored by cameras. Once the bad guys are found, they can be dealt with in time or the suspects can be found.