Why can't SF find logistics information on the Internet?

The seller only filled in the single number, did not deliver the goods or filled in the wrong single number; The courier company took one and didn't scan it.

The methods for querying express logistics information online are as follows:

1. When delivering goods, you will be asked to fill in the express delivery document. Leave one copy to the sender in quadruplicate. There is a black number or a combination of numbers and letters at the bottom of the list, which is the single number of the products sent. You can inquire through this single number.

2. Enter the name of the courier company in Baidu search bar to find official website of the courier company.

3. In the "single number inquiry" area of Express official website, enter the mailing number. Input should be accurate, and the input error cannot be found.

4. Click the "Query" button to see the logistics of the goods.

5. Save the single number. If the goods have not arrived at the destination, you can also choose to save the order number at this time to facilitate the next inquiry. After saving, you don't need to enter the courier number for the next query.