The format of the worry-free standard order number of AliExpress is as follows:

13 digits + letters + check code

Among them, the 13-digit part usually represents the order number of the logistics company, the letter part represents the abbreviation of the logistics company, and the check code is the code used to verify whether the order number is legal.

For example, a typical worry-free standard order number may be as follows:

12345678901234567890ABCD

In this example, 12345678901234567890 represents the order number of the logistics company, ABCD represents the abbreviation of the logistics company, and the last check code is used to verify the legitimacy of the order number.

It should be noted that the order number formats of different logistics companies may vary slightly, but they usually follow the above rules. When querying the worry-free logistics order number, please make sure that the order number format entered is correct so that the logistics information can be accurately queried.