Find the folding method of rectangular envelope, preferably with pictures.

First, fold A4 paper in half along the long side to make the middle crease clear.

2. Open the paper and turn the lower right corner of the paper to the left, that is, the corner at the middle crease.

3. Fold the lower left corner upward so that it coincides with the corner of the lower right corner.

4. Fold the upper left corner down so that it coincides with the corner edge of the lower right corner.

5. Finally, fold down the redundant upper right corner to make it coincide with the corner edge of the lower right corner, so that the simple envelope is made successfully. Finally, put the new envelope in and seal it with tape.

I. Tools/materials:

Paper, pen, scissors.

Second, the operation method:

1. Pick up the prepared paper and fold it in half first.

2. Then open it, and then fold the edges of both sides in half to the creases just folded in half. Leave about a centimeter of paper.

3. Open it again and fold the vertical edge of the crease inward about one centimeter.

4. Stick the second and third creases with adhesive tape.

5. Then cut off the excess paper, as shown below. The shape is ready.

6. Next, you need to draw a box to write the postal code, which is on the top left of the front of the envelope. Draw two lines, one is the address of the recipient and the other is the address of the sender. Draw six zip code boxes in the lower right corner! Finally, draw a box in the upper right corner and mark the position of the stamp!