1. Open your App Store, the App Store on Apple's phone.
2. Enter "Ruixun University" in the search box, and then click the search button.
3. In the search results, find the app of Ruixun University, and then click the icon of the app.
4. After entering the application page, click the "Download" button.
5. You will be asked to log in with your Apple ID to confirm the download. Please follow the requirements.
6. After the download is completed, the Ruixun University app will be automatically installed on your mobile phone.
7. Open the app of Ruixun University and log in or register your account according to the prompts.
If you encounter download or installation failure, you can check your network connection, or try to restart your phone and try downloading again. If the problem still exists, I suggest you contact Apple Customer Service or the official support team of Ruixun University for more detailed help.