1, open the phone settings, and click more settings.
2. Click the shortcut key and click the back.
3. Click and tap twice, then check and scan.
Epidemic code refers to three codes: electronic health code, communication big data travel code and peer confidential personnel self-inspection information code. The "Three Codes" of epidemic situation is a personal two-dimensional code based on personal real data combined with epidemic prevention big data information, which is the electronic certificate for personal daily travel during epidemic prevention and control.