This sales call said to give you a health radio for free. Let the old man listen. Very unreliable. It's free. I'll give you a courier. After you receive it, there are many routines. And in my opinion, it is nonsense to lie to the elderly for health preservation. If listening to the radio can keep fit, then the old people in the past listened to the radio. I didn't see any effect either. When you meet this kind of call, you'd better refuse to answer it. You don't know where the call came from.