The reasons are as follows.
1. health code needs to be opened through software networking. Without the network, the software can't load the page.
2. Saving health code screenshots has no effect.
Nucleic acid detection process:
① Register an appointment on the "Healthy Cloud" app, "Citizen Cloud with Label" app or applet;
② After completing the appointment registration, you can get the QR code (please take a screenshot in advance and save the QR code for nucleic acid registration);
③ Go to the nucleic acid detection service point with the QR code, and perform nucleic acid detection after scanning. There will be volunteers on the spot to provide guidance and help for booking registration.