I received several harassing calls in succession today. A robot's voice kept saying something about a flat tire.
I received it, too. It belongs to Nanchang, Jiangxi. I listened to it three times, so I hung up. Personally, I think it's either a prank, or our phone is busy, and then we threaten our family or steal our credit cards, so that we can't receive information or receive other calls for the time being. In this case, hang up the phone quickly and let the phone recover smoothly.