1. Open WPS text and create a new document. Then click "Insert" in the toolbar, click the small arrow to the right of "Table", and click "Insert Table" to set the number of columns and rows of the table according to your own needs.

2. Select all tables, click Table Style in the toolbar, and then click Borders to select Borderless, and set the line thickness to 1.5 points.

3. Now the tables have no borders. Select all the tables, click "Borders" and select "Top Borders".

4. Select all tables and click "Border" to select "Bottom Border".

5. Select the first line of the table, change the line thickness to "0.5 point", and then click "Bottom border".

6. After completing step 5, you can see that three rows in the table have been completed. Next, you can enter data according to your own needs.

7. After data entry, you can click File-Print Preview to see if the three-line table you set meets the requirements. If there is a problem, you can modify it again.