Why do hotels use key cards instead of keys, and people who know the hotel need to give them comprehensive popularization?

Hehe, it may not be perfect in several ways. First, the cost. As an enterprise, cost control, regardless of size, is not limited to the mechanical key and the room card itself, and once the mechanical key is lost, it must be replaced together with the room door lock. For the guests, the price to be compensated is too high, and it is also a very troublesome thing for the hotel to change the lock. Second, safety. Safety is the top priority of hotel work. In the hotel, people from different countries and nationalities will be received. Safety has always been the focus of hotel work. Once the mechanical key is lost, the hotel must change rooms for the guests from the perspective of property safety, and this room cannot be used for reception until the door lock of the room is changed. Now the electronic room card only needs to inform the front desk that the room card is lost, and the front desk only needs to make a new room card, and all the previous room cards are invalid. With the electronic key card, the hotel can control the room more actively. Even if the guest doesn't return the room card to the front desk, it won't affect the next guest's check-in, or if the guest needs to continue to check-in because the deposit is not enough, the hotel can also void his room card through the system, so the guest has to come to the front desk to reissue the card and pay the deposit, just like the problem of master key and landing key mentioned earlier. I can open all the hotel rooms with the master key, and I only need the room card when cleaning. Oh, by the way, I can't read any data with the mechanical key, but I can read the time of any room card, which room door is open, or any door lock, when and what door card to use through the system. However, there are also many boutique hotels, such as Banyan Tree or Fayun 'an, with few rooms, or some retro-themed hotels, which will take mechanical keys as the characteristics of hotels and publicize their own particularity.