Is it a fraud message that Taiyuan received a mixed message?

It is not fraud to receive mixed information in Taiyuan. According to relevant information, Taiyuan received a text message saying that the recent nucleic acid test report was abnormal and needed to be reviewed by the nearest nucleic acid testing institution. Single sampling means that one person's collection swab is put in a collection tube, and mixed sampling means that 5/ 10/20 people's collection swab is put in a collection tube.