1. Choose a piece of cardboard with moderate thickness and fold it in half. The purpose of this is to leave a crease for subsequent folding.

2. Fold the cardboard in half to make it a smaller rectangle. Then, the two ends of the rectangle are folded towards the center to form two triangles.

3. Open the tops of two triangles to form a small square. Then, the two corners of the small square are folded inward along the original crease to form two small triangles.

4. Fold the bottom of the small square upwards and then open it to form a small rectangle. Then, the two corners of the small rectangle are folded inward along the original crease to form two small triangles.

5. Fold the small rectangle in half to make it a smaller rectangle. Then, the two ends of the rectangle are folded in half towards the center to form two small squares.

6. At this point, a simple origami wallet is completed. If you need to increase the aesthetics, you can draw some patterns or stick some stickers on the surface of your wallet. Be careful not to break the paper jam during folding. At the same time, you can adjust the folding strength and angle according to your own preferences to create different shapes and styles.

The function of origami:

1, origami can exercise people's hand muscles and brain coordination. Origami can promote the development of hand muscles and improve the brain's ability to control hand movements.

2. origami can cultivate people's observation and attention. In the process of origami, it is necessary to constantly observe and pay attention to every folding step, so as to ensure the accuracy and aesthetics of origami.

3. origami can also cultivate people's patience and meticulousness. Origami needs to wait patiently for the completion of each folding step and pay attention to every detail at the same time, so as to ensure the quality of origami.

4. origami can also help people relieve stress and anxiety. Through origami, people can concentrate and forget troubles and pressures.

5. origami can also enhance people's imagination and creativity. Different folding methods and techniques can create different shapes and styles, thus stimulating people's imagination and creativity.

6. Origami is an activity with multiple functions and meanings. It can not only train people's hand muscles and brain coordination ability, but also cultivate people's observation and attention, enhance people's imagination and creativity, and relieve stress and anxiety. Therefore, origami is a very beneficial activity, which is worth trying and learning.