Second, fold the corners of the square in half to get two diagonal lines.

Third, fold each corner in half to make a smaller square.

Fourth, turn the paper over and then fold each corner in half.

Fifth, turn the paper over and then fold each corner in half to the middle.

Sixth, turn the paper over and open the four small squares on it outward to get four small rectangles.

Seventh, fold the upper rectangle up and the other three rectangles down, and a small chair will be folded.