What should I do if the QR code of Guangzhou Metro shows red?

Does the subject want to ask: "What if the QR code of Guangzhou Metro is displayed in red?" ? Contact local epidemic prevention and control center. Passengers whose health code is yellow or red will only display the prohibition symbol of the corresponding color, but not the boarding code. Passengers are not allowed to enter the station at this time. Don't panic when the QR code of the bus turns red. You should contact the local epidemic prevention and control center in time, listen to the arrangement of the CDC staff, go to the designated medical institutions for nucleic acid testing, medical observation, and wait patiently for the results of nucleic acid testing. If the test results are negative, the relevant departments will modify your boarding code, and the boarding code will return to the green code.