The order may have abnormal discounts, abnormal transaction time, abnormal logistics, multiple operations on the same machine, and other transaction problems; the Alibaba system has a certain degree of suspicion about this transaction, which may be caused by fake orders or multiple transactions on the same IP; the merchant's products have been removed from the shelves, and you need to contact the merchant to inquire about the specific situation; if it is an online bank or credit card payment, it is a problem with the bank's system; but if there is an abnormality with direct Alipay payment, it is generally caused by unstable network.