2. Then aim the two sides of the triangle at the center line and fold down.
3. Continue to cut the triangle with scissors.
4. Then fold another one in the same way, then fold it up and down, and cut off two triangles at the crease.
5. Then unfold the two folded sheets of paper and stick them with double-sided tape.
6. Continue to spread in the middle and press the crease.
7. Then take another piece of paper, cut it, roll it into a stick, and cut off the tip of the sector.
8. Finally, put the paper stick in as an umbrella handle, cut the remaining paper into two pieces, stick them inside and outside the fan, and fold the umbrella by hand.