It is illegal to send mobilization messages to residents in the jurisdiction.

I received a phone call from here the other day, just like yours. /kloc-0 registered a calling card in Beijing on October 28th. 10. This card sent a lot of junk information to Beijing residents, and was complained by residents, so I had to stop using my calling card. Asked if I knew, he also gave me the ID number and name accurately. I felt something was wrong, so I hung up. Then he changed two numbers to call me back. I am more convinced that he is a liar. Then I went to the mobile company and asked them that he was a liar!

They said that someone had talked about this situation before.