How to fold the paper by hand to make it realistic and beautiful?

Take out a square piece of paper and cut it in half.

Fold the lower right corner to the left, fold the upper part in half and cut it open.

Then fold the lower left corner to the right and expand it.

A crease as shown in that figure is obtain.

Fold the bottom edge up to the middle intersection and restore.

Fold the left and right sides to the middle.

Open the bottom, fold it up and flatten it.

The two corners of the bottom edge are folded back, which is 1/2 of the bottom edge length.

After flattening, as shown in the figure.

Turn it over.

Fold the middle two corners outward.

ecto-entad

Fold the fish in half.

Restore, turn it over.

Connect the crease on your body with the midpoint of the fish mouth and fold it to the right.

Flatten hard.

The right part is also folded and restored.

Turn it over.

Press down the longitudinal crease in the middle of the body.

Fold it like this.

Seen from the side.

Pay attention to the wrinkles and bottoms on your body.

Push the bottom up from the middle of the body.

Fold like this.

The two inclined parts of the body flatten out.

Seen from above.

Fold your body in half.

Fold off the corner of the tail.

Open in the middle and fold down.

Get what the picture looks like.

Fold both sides of the fish tail.

The lower corner is folded.

Open the fishtail from the middle.

Tidy up the goldfish head.

Sort out the physical details again.

Seen from above.

The vivid origami goldfish is finished!