How do the southeast and northwest overlap?

The manual folding method of "Southeast and Northwest" is as follows:

I. Tools/raw materials:

Paper.

Second, the specific steps:

1, prepare a square piece of paper and fold the square piece of paper into a "cross" crease.

2. Fold the four corners of the square to the center point respectively.

3. Turn to the back and turn the four corners to the center respectively.

4. Fold in half along the center line of one pair of sides, and then unfold the fold along the center line of the other pair of sides.

5. Put your hands in four small squares.

6. The origami in the southeast and northwest is finished.