Bank processing delay, incorrect information provided and abnormal account. Bank processing delay: sometimes banks will have a certain delay in processing refunds, especially when the transaction volume is high. You can wait a while and see if the funds will arrive. Incorrect information provided: the bank account information provided to China Southern Airlines is incorrect, or the name does not match the bank information, which will lead to the failure to successfully apply for a refund. Ensure that the information provided is accurate. Abnormal account: The bank account status of is abnormal. If it has expired or been frozen, no refund will be received. Check whether the account status is normal.