Look!
Main material: old advertising paper, Tools required: Skillful hands, Production steps:
Step 1: A rectangular piece of paper.
Step 2: Fold in half.
Step 3: Fold one side back in half
Step 4: Fold the other side back in half.
Step 5: Use the two layers to fold the four corners in half.
Step 6: Fold the four diagonal corners in half.
Step 7: Do as shown in the picture and fold in half.
Step 8: Open gently.
Step 9: Open slowly. .
Step 10: Open with small force.
Step 11: Press slowly.
Step 12: Same on the other side.
Step 13: After folding, it looks like the picture below.