4:40 and 5:20. According to the Bank of Communications Credit Card Network query: According to the unified organizational arrangements of the financial industry, in order to provide you with better services, our center will open on July 22, 2023 (3:40-4:40), July 23, 2023 The system will be upgraded and maintained on Sunday (4:20-5:20). During the above two time periods, our center will suspend services for 30 minutes each. We sincerely apologize for any inconvenience this may cause you and apologize for your understanding.