If you come back from a different place, you can call the society first to report it. If you come back from a risky place, you can also check the nucleic acid yourself and then call the social grid staff to report it. After the nucleic acid results come out, whether to enter isolation depends on a person's quality. If you go back to a high-risk area and don't do the above procedures, nothing will happen. Once something goes wrong, poverty must be investigated for legal responsibility.