1. Select Puyang Health Code Change Application in WeChat Medical Health.
2. Extract the trip code from the mobile phone and print it out.
3. Negative nucleic acid certificate issued by medical and health institutions within 48 hours.
4. Send it to the office of COVID-19 Epidemic Prevention and Control Headquarters in Puyang City by e-mail. You can change the code after approval. The above is the application method without changing Puyang code.