according to the latest information, the grace period for repayment of the credit card of Postal Bank is 4 days, which means that the cardholder can complete the repayment within 4 days after the last repayment date, and repayment within the grace period is regarded as timely repayment, which will not cause overdue fines or affect personal credit history. The specific deadline is before 17: pm on the fourth day of the grace period. If the cardholder needs to delay repayment beyond the grace period, he should take the initiative to contact the Credit Card Center of Postal Savings Bank to apply for special delay repayment. According to the cardholder's specific situation and relevant policies, the bank will examine and approve whether the arrangement of deferred repayment can be given, as well as the specific conditions and expenses of deferred repayment.