How to fold stationery beautifully and simply?

1. Fold the two short sides of the prepared A4 stationery in half.

2. Open the paper and fold the triangle along the center line.

3. The other side is also a triangle along the center line.

4. The remaining two small corners are folded along the seam.

5, the back is folded in half.

6. Fold it again.

7. Put the two sides together.

8. Tuck the upper left corner into the triangle on the other side.

9. Simple stationery will fold.