How to cut butterfly paper-cut

A square piece of paper folded in half. Draw your favorite butterfly shape on half a piece of paper, with the body part close to the broken line. Remember, polylines can't be cut, but they can be hollowed out; Butterfly, remove the hollow part, the lines should be coherent, not completely broken. Cut out the hollowed-out parts as usual. As shown in the figure:

Here are some butterfly styles:

(For drawing and reference)

Decorative patterns of paper-cutting:

Crescent pattern, sawtooth pattern, vortex pattern, moire pattern, geometric pattern and fish scale pattern. . . . .