Why can't Hefei Card receive the short message from Nanjing Epidemic Prevention Station?

Hefei Card can't receive the short message from Nanjing Epidemic Prevention Station because the short message from Nanjing Epidemic Prevention Station is sent according to the number attribution, and only people who belong to Nanjing can receive the short message from Nanjing Epidemic Prevention Station. The short message of epidemic prevention station is determined by the attribution nature of foreign numbers. CDC staff will dynamically send epidemic prevention messages to outsiders according to the signals provided by mobile companies. The foreign number is judged as a foreigner, so an epidemic prevention message will be sent. The local number belongs to the permanent population and is not issued.