My idea of how to connect the library WiFi is like this. The following are my answers and views on this question.

What I want to say is that there are many kinds of libraries, some in schools and some in cities. These libraries have different WiFi connections.

The second thing I want to say is that in the school library, we can use the school campus network to connect to WiFi. In the city library, we can see if there is any relevant WiFi display, and then connect to WiFi according to the prompts.