Luotn - WiFi

The speed of internet is really slow and terrible always cause a long time can login, if we use our computers in library.

Thank you for taking the trouble to tell me about the problems you have been having with University WiFi. I understand how frustrating it must be for the connectivity not to live up to your expectations
The University has a cross Campus project to improve the WiFi connectivity at every Campus. None the less in high traffic areas with each individual having an average of 2 -4 WiFi dependent items, the University bandwidth is bound to struggle.
May I suggest that you move to slightly quieter area where the connectivity might be more consistent. Or use a University PC while you are on Campus or use Eduroam which should be a more stable connection.
http://lrweb.beds.ac.uk/libraryservices/visiting/eduroam