It depends on what school you are in. If you are a graduate student, Internet access is monopolized by Unicom, so you have to use Ruijie, and Ruijie can only use Unicom's number. This is actually quite advantageous. In addition, both mobile and telecom have time to send wireless internet access, depending on your package. However, if you are a graduate student, living in the newly-built graduate apartment only has telecom WIFI, and other schools are not familiar with broadband, but both mobile and telecom Unicom have discounts. . .