The method is:

1. First, find a red square cardboard.

2. Fold the cardboard in half, and draw the cow pattern on the back according to the picture.

3. Cut out the pattern and expand it.

4. Then the shape of a cow is obtained.

5. Then draw a shadow on the cow pattern according to the picture.

6. Finally, cut out the shadow and get a beautiful paper-cut work of the Year of the Ox.