Xiaomi Smart Air Purifier 4 keeps showing offline or unable to connect to WiFi in the APP, how to solve it?

Solution:

1. Confirm whether Xiaomi Smart Air Purifier 4 is powered on and running normally;

2. Confirm whether the Wifi is normal;

3. Please unplug the power cord, and then turn it on after 10 seconds (the power needs to be discharged for a while), try to reset the Wifi of Xiaomi Smart Air Purifier 4, and reconnect to the Wifi.