The information maintenance of rural credit cooperatives is to re-record and improve personal information. Such as changes in telephone numbers and home addresses. The information you left when you were doing business in the credit union was incomplete or the information has changed now, so you need to go to the outlet to update the information, which is also a kind of protection for your personal banking information. Perhaps it is because the information was incomplete when I applied for a credit card, and I need to provide an ID card to supplement it.