1. Log in to the router's management interface: first you need to know the router's login address and administrator password. This information is usually marked on a label at the bottom of the router. If you haven't changed the default login address and password, try using the default login address (such as 192.168.1.1 or 192.168.0.1) and the default password (such as admin or password).
2. Open a browser and enter the router's login address to enter the router login screen. Enter the administrator password and click the Login or OK button to enter the router management interface.
3. In the router's management interface, find the Wireless Settings or similar function option, and click to enter.
4. In the wireless settings interface, find the wireless password or similar function options, click modify.
5. Enter the new WiFi password, confirm and save the settings.
6, reconnect WiFi: In the device's WiFi settings, find a known WiFi network and click Forget this network. Then search and connect to that WiFi network again and enter the newly set password.
It should be noted that the layout and functional options of the management interface may vary between router brands and models. If you encounter problems during operation, it is recommended that you consult your router's manual or contact the router manufacturer for assistance.