What are some magical ways to fight scammers?

When I was having dinner with my friends a few days ago, an unknown number called her. After she picked up, she pressed the speaker phone and said something in a recording mode. At this time, everyone advised her to put it down. The phone hangs up. But she said that since someone called me, someone would definitely talk to her. Sure enough, after the recording, a young man actually promoted Kweichow Moutai to her. At this time, my friend said very sincerely that she was getting married soon, which happened to be I needed to purchase a batch of wine for a wedding banquet. The person on the phone immediately told me how delicious their wine was and how genuine it was. My friend said, "Well, you can send me two boxes first and I will try them, and then we can make a large quantity." purchase".