How does the computer send messages to the mobile phone through wireless routing? Can you tell me the specific implementation process? Thank you

The computer sends information to the mobile phone through wireless routing?

This means that both the computer and the mobile phone must be connected to the wireless router to communicate, or the computer is connected to the router and sends messages to the mobile phone through the network.

In order for the computer and mobile phone to send messages to each other, the premise is that the wireless router must be connected to the internet, so that the computer can connect to the wireless router before surfing the internet. You can easily send messages to your mobile phone by changing the network.