Gansu Bank made it clear that the repayment was overdue because of system delay. This kind of repayment does not arrive in real time, and it takes 2 to 3 days to arrive. Therefore, in this case, repayment should be made several days in advance in time, which can be avoided.

Overdue refers to failure to perform corresponding obligations or responsibilities beyond the agreed time, such as failure to repay or pay off within the agreed repayment period after borrowing. This stage is called overdue.