How to fold envelopes

1. Prepare square paper

2. Fold the paper in half according to the middle edge, do not fold it diagonally. When folding in half, use your fingers to press the scratches, and then fold toward the center again. Fold the crease in half and press it on both sides. This means that this square paper currently has three creases.

3. Fold in half to the center crease line. Do not turn over the last crease. Fold the edges in half to the center crease line.

4. Fold the corners of the envelope, and fold the folded thick part into a 45-degree angle. Do this for both corners.

5. Fold inward, and fold the 45-degree angle folded in the previous step inward along the other side of the isosceles right triangle.

6. Find the center point. At this time, you are more than half successful. Find the center point of the edge that has not been folded in half.

7. Fold out a right angle, fold one edge of the center line you just found, and fold the two corners in half toward the middle line.

8. Fold upwards. At this time, what we get is a triangle on the top and a rectangle on the bottom. Next, bend the triangle downwards and fold it in half, and poke into the crease on the edge of the rectangle.