Material: a square piece of paper.

The first step is to prepare a square origami, fold it up and down, fold it left and right, and make two horizontal and vertical creases respectively.

Step 2, then fold the four corners of the origami inward at the center point respectively. ?

The third step is to fold and turn it over. As in the previous step, the four corners are folded inward respectively.

The fourth step is to turn the origami upside down, and then fold the four corners inward respectively.

Step 5, turn the origami over again and pull out the four corners one by one, as shown below. ?

Step 6: Finally, fold three faces downwards and the other face upwards. So the chair is finished.