1. First, open the phone, find the WeChat app on the phone display, and open WeChat.
2. Secondly, enter WeChat, click "I" and select "Service".
3. Finally, click "Epidemic Prevention Health Code" to view the "Epidemic Prevention Health Code", click "You have received it, now view it" to enter the page, and then drop down and click "nucleic acid and antibody test results query" to query.