You can turn on the hidden functions of Windows 7: virtual WiFi and SoftAP (that is, virtual wireless AP), you can turn your computer into a wireless router and achieve shared Internet access.
netsh wlan set hostednetwork mode=allow ssid=wifi key=123456789
netsh wlan start hostednetwork
After successful opening, there will be an additional wireless connection 2 with the network card "Microsoft Virtual WiFi Miniport Adapter" in the network connection. For convenience, it will be renamed as virtual WiFi. Some win7 may not find the network connection, in the control panel \ network and Internet \ network and sharing center point to the left of the change adapter settings is the network connection.
In the "Network Connections" window, right-click the network connection that is connected to the Internet, select "Properties" → "Sharing", tick "Allow other connections (N)" and select "Virtual WiFi" . After confirmation, the word "Shared" will appear next to the icon of the network card that provides sharing, indicating that the "Broadband Connection" has been shared to the "Virtual WiFi".