For professionals who understand IC cards, please advise: Can hotel IC room cards be purchased separately? Don't you need to buy an IC card from the original lock supplier?

The technical angle can be purchased separately, but it needs to be limited.

There are many kinds of hotel door cards, such as magnetic stripe cards, contact ic cards and non-contact IC cards. You need to find a knowledgeable person to see what kind of card your card belongs to, and then you can contact the card manufacturer or agent directly.

There is no security problem.