2. Open the word document that needs to generate the table of contents, and insert blank pages where the table of contents needs to be generated to prepare for the table of contents.

3. Select the first-level title

4. Select a sub-title.

5. Select the third-level title and the fourth-level title (if not, you don't need to choose).

6. According to the above steps, select all titles according to the corresponding series, and finally the table of contents as shown in the figure will appear on the left side of the interface.