From 10 pm to 7am, the maintenance of the banking system usually takes about 8 hours. This time period is chosen because during this time, the bank's business is relatively small and the activities of users are limited, so the impact on users is small. The main purpose of maintenance is to ensure the normal operation and security of the banking system. During the maintenance period, some services may be suspended, but ATM machines can still be used. The bank will inform users in advance and update the maintenance schedule and time in time to ensure that users understand the maintenance situation and make corresponding arrangements. Through regular system maintenance, banks can ensure the stability and security of the system and provide users with better service quality.