When writing a paper with wps, the solution to the blank half angle after the serial number is as follows:

1. Right-click the document and select bullets and numbers.

2. Select a custom list and click Customize. Please note that a custom list is selected first.

3. Click Advanced, select a tab in the drop-down list after the number, and enter 2 characters in the tab stop position.

4. After clicking OK, you will see that two characters after the number are left blank and deleted.