If the configuration of the router is incorrect, ping the gateway when you enable DHCP or manually specify the IP address, gateway, and dns of the wireless network adapter. If the IP address can be pinged, ping an external website such as 163.com to check whether the IP address can be resolved or the connection can not be connected. If not, disconnect the cable and connect only the wireless network.
There may be confusion inside the machine sometimes, only one network can be connected, and the routing error leads to the phenomenon that clearly two networks can be accessed, and the result is not available