The bank card issued to you when you enroll at Beihang University requires you to deposit all the tuition, accommodation fees, etc. for that year before the start of the school year in September. The Beihang University will debit the corresponding amount at the start of the school year. You don’t need to go to the property to pay on the spot, which is more convenient. Beihang's student subsidies and some teachers' subsidies will also be distributed in this account. It seems that scholarships will also be distributed here. Other than that, this is no different from an ordinary bank card. You can use it as a savings account if needed. Just withdraw money when the time comes, but this is not a credit card and cannot be overdrafted.