Can Beijing not go when it receives a short message with abnormal nucleic acid?

Beijing can't help but go when it receives a text message with abnormal nucleic acid. According to the relevant information of the query, it shows that Beijing may not send the message after receiving the message of abnormal nucleic acid. In the crowd with abnormal positive nucleic acid, if the person is confirmed to be negative by single examination, it should be judged whether he is a close contact in time, generally within 24 hours, and if he is not a close contact, the isolation should be lifted immediately.