Will the Public Security Bureau send private number text messages?

Of course not. It must be from the company number. If you want to arrest someone, of course, it is door-to-door service.

Think about it. If everyone uses their own mobile phone to send text messages, how much phone bill should they bear and how can they reimburse the company? Moreover, the content of this short message is not neatly typeset, which is fake at first glance.