1, check whether the network connection is normal. Make sure your device is connected to the Internet and try restarting Wi-Fi or moving data.

2. Make sure that you are running the latest version of the application. If there is an update, please download and install the latest version.

3. Try to clear the cache and data of the APP. On Android devices, you can set >; "application" >; "Fuhui Education", and then click "Clear Cache" and "Clear Data". On the iOS device, long press the app icon on the home screen, and then select Delete App. Download and install the application again.

4. If these methods can't solve the problem, please contact the customer service support of Fuhui Education, and they may provide some other solutions.