Go to school by bus after school starts. Cell phones are not allowed in schools. The driver can check the health code. Can you print the driver's health code?

Yes, explain the situation to the driver, and then show him the printed health code, but the health code should be color printed, because it depends on whether it is green or not.

Then the date should be the latest, and I believe the driver can understand. After all, support is the driver's job, and some things should be done according to the actual situation, not too stubborn and absolute.