The principle of automatic directory generation is that WPS extracts the characters corresponding to the outline level and arranges them. Does not appear in the automatically generated directory, indicating that the outline level of this text is not enough.

The solution is: select "Abstract", select "Paragraph" from the right-click menu, adjust the "Outline Level" to the first level (this depends on your catalogue requirements, which is generally the case with papers), and then update the catalogue.

For WPS 20 12 interface, it is relatively simple. Select the word "abstract" and enter it in "citation->"; Directory "submenu, select" directory level ".