The bank card issued to you by Beihang University requires you to deposit all the tuition and accommodation fees of that year before the start of school in September each year, so Beihang University will cross off the corresponding funds at the beginning of school, so you don't need to pay the fees at the property site yourself, which is quite convenient. Students' subsidies of Beihang University and some teachers' subsidies will also be paid in this account, as if scholarships will also be paid here ~ Besides, this is no different from ordinary bank cards. You can use it as a savings account and withdraw money if necessary, but it is not a credit card and cannot be overdrawn.