Now there is an ID card swiping system at the front desk of the hotel. It is said that the system is connected to the public security intranet?

You are talking about PSB system. Brush your ID card without calling the police. Generally, we only scan the head of your ID card, and then enter the corresponding name and ID number. These data are uploaded to the public security bureau every day. If you see it, the PSB machine at the front desk may just be connected to the security department of your hotel, and then the security department will tell you that the data will be transmitted to the public security bureau.