The Xi'an Epidemic Prevention and Control Sub-district Office will use virtual phones to call and add WeChat. These are all deceptive scams.
If the Xi'an Epidemic Prevention and Control Subdistrict Office wants to contact citizens, it will make real-name calls or send reminder text messages. Under normal circumstances, it will not add WeChat.
You can ask nearby epidemic prevention points for consultation, and at the same time improve fraud prevention awareness.