What to do if the Xiaomi Robot Vacuum X20+ shows offline?

If your Xiaomi Robot Vacuum X20+ encounter this problem, please refer to the following steps:
1. Check if the robot vacuum is turned off. If it is, press and hold the power button to turn it on;
2. The robot vacuum can continue cleaning even when offline. When the network signal improves, the robot vacuum will automatically return online;
3. Try adding or resetting the network for the robot vacuum, selecting the router network closest to the robot vacuum for configuration;
4. Check if the Wi-Fi is working properly.