1. Place the jigsaw frame on the plane, and put the jigsaw picture on the frame to ensure that the edge of the jigsaw picture is aligned with the edge of the frame.

2. Starting from one side of the insert, slowly splice the insert to the frame to ensure that the edge of the insert is aligned with the edge of the frame.

3. Complete the mosaic, and fix the border on the mosaic to complete the mosaic border.