Open the wps software on the computer and enter. After entering, click the Insert menu, and then click the picture. In the dialog box that opens, locate the handwritten signature picture file you want to insert, and click Open. At this time, select the inserted signature picture, click the color, select black, then find the button background and click. In the pop-up menu, select Set Transparent Color, select the layout on the picture, adjust the position of the signed picture, and the operation is complete.

If the inserted electronic seal picture is in PDF format, I suggest you directly ask the advertising company for help.