Why doesn't Xuzhou Health Treasure give a code?

It's an application problem.

The main reason is that you haven't logged in for a long time, so he didn't come out. You have to log in again.

You can't go to Beijing by plane or high-speed train without a negative 48-hour nucleic acid test, and you will be discouraged before entering the station. People in high-risk areas are restricted from entering Beijing, and they need to wait until they are reduced to low-risk areas before entering Beijing.