What is it about selling telecom cards on the fourth floor at ten o'clock at night?

It may be a scam to sell telecom cards on the fourth floor at ten o'clock in the evening. Because the mobile phone card is authenticated by real name, it is related to the safety and privacy of users. Only the business hall can complete it, and business personnel are not allowed to sell mobile phone cards at home.

Please note that if the other party shows unreasonable behavior in the sales promotion process, such as breaking into houses or threatening words, you should call the police immediately. At the same time, if you have any doubts about each other's behavior, I suggest you call the police to ensure your own safety.