First, the network signal is poor, resulting in the health code can not be displayed normally;
2. My personal information is incorrect and needs to be re-filled;
Third, because you are not logged into the health system, you can't check it.
When the network is bad, the health code cannot be displayed. Because the refresh of health code needs network support, if we are in a place with bad network, it is very likely that we will not be able to display health code normally.