1. Open a mobile App Store (such as App Store or Google Play).
2. Enter "Fat Yue saves trouble" or "Fat Gui Shi Sheng" in the search bar to search.
3. Find the corresponding application, and then click the download button.
4. Wait for the application to download and install.
5. Open the Fat Moon Easy APP and register and log in according to the prompts.
6. After logging in successfully, find "My Health Certificate" or similar entrance, and click Enter.
7. On the health certificate page, you can choose to view, download or share your health certificate.
Please note that the above steps may be different due to factors such as Pang Yueyi's APP version and mobile phone operating system version. If you encounter any problems, it is recommended to consult the official customer service of Fat Yueyi APP or consult the relevant user guide.