Living with a friend, he came back from the epidemic area without his code or even mine. What happened?

This situation has the following possibilities:

1, because this area is the hardest hit area, no health code will be issued.

2. Temporary health codes will not be displayed during closed management.

3. The specific sending time needs to be notified by the local epidemic command.

4. Check your own network. If the network is poor, it cannot be displayed.

5. Check your information, because your information is wrong.

Because many people need to use the health code now, especially in some concentrated places, when everyone logs in at the same time, this health code often disappears and there is no way to display it, so just wait patiently or use it again after a while.