1, prepare colored cardboard, ruler, scissors and pencil first.

2. First, draw a square on the colored paper board with a pencil.

3. Draw four rectangles of the same size outward from the four sides of the square.

4. Draw four triangles and draw the height of the triangles.

5. Draw two trapezoids with the same size outside the upper and lower rectangles.

6. Draw two rectangles with the same size on both sides of the left and right rectangles.

7. Draw half hearts on both sides of the left and right rectangles.

8. Cut the paper along the outermost contour of all the figures with scissors.

9. Cut out two adjacent heart-shaped lines with scissors.

10, fold out all creases.

1 1, four triangles are folded into the box, and the sides of the box are there.

12, insert two hearts alternately, and a lovely blind box will be made.