Generally, your student ID card is followed by your student number (generally 12 digits) and campus card number (generally 6 digits). According to my experience (senior year), in school (comprehensive educational administration, course selection system, online classroom, self-help by network management committee, self-help by campus card, and registration at level 46), I mostly use the library login system. So it's basically related to your student number, but the card number has little to do with it ... compare your own situation!