The short message number of the procuratorate prosecuting the crime.

First of all, if you are involved in a criminal offence and are put on file for investigation by the public security organ, your case will probably be transferred to the procuratorate, but if the public security organ puts on file for investigation, of course you will know, because the public security organ will ask you to make a record, and there is no prosecution case without taking a record. Secondly, you can directly check the telephone number of the procuratorate office online, call the public prosecution department or the criminal prosecution department, and then call to ask if you have received the case of the suspect. People in the public prosecution department will usually check it for you, so as to distinguish the authenticity of this message.