Express number is the number posted on the express bar code after the express is sent, so you can query the express logistics information accordingly.
The order number is the number recorded by the merchant after purchasing the goods, and you can find your order information accordingly.
For example, you bought something with the order number 123 and the express delivery number of 456.
Through 123, you can find out what you bought in this store and when you bought it, which is also one of the after-sales guarantees.
And through 456, you can query the logistics information of your own express at any time.
Order number: it is the order number you get after shopping on the shopping website, which records the information of the shopping order.
Courier number: Courier number is the unique identification code of the express parcel, which contains the detailed information of the recipient's express mail, usually consisting of numbers and letters. The courier number can facilitate the courier company, the sender and the recipient to track the courier information in real time.