First, the receiving time is too short. That is to say, the seller delivered the goods, because it was a delivery, and he filled in the delivery note number. But the courier didn't come to pick up the goods, usually in the afternoon. Then, after the courier scans the order number, the logistics information will be displayed. For example, the courier has received the goods.
Second, the system update is not timely. It's just that the logistics has been delayed, and it may have been delivered, but the system has not been updated in time, so you can't find the logistics.
Third, there is another possibility, that is, the seller sent the order number, but there was no delivery, and the courier did not come to pick up the goods. For example, there is no delivery today, and when you check again tomorrow, there is no logistics information, because the courier did not receive the goods at all, so you still can't check the logistics information the next day.
If you can't find the logistics information by entering the express number, that's basically the above reason. You can wait patiently.