Step 1: The following figure shows the basic materials we need to prepare. A piece of paper is longer and a piece of paper is shorter, so the cardboard will be thicker and less deformed. In addition, double-sided tape and scissors should also be prepared.

Step 2: First take out the long paper. Cut it in two like this.

Step 3: Take out the long part and stick it with double-sided tape.

Step 4: Stick together like this, as shown on the right.

Step 5: press down, stick double-sided tape in the middle part, and then stick it.

Step 6: Take out a short piece of paper, wrap it around it, and finally fix it with double-sided tape.

Step 7: Take out the remaining piece of paper.

Step 8: Fold along the middle part and cut out the shape you like with scissors.

Step 9: Then pull the two sides outward to form this shape.

Step 10: Paste the just finished part on the back, and a simple decorative bow is finished.