How to lose a long chin?

When there is a lot of meat on your chin, you will look fat on your face and the whole person will look fat.

That's what I thought. I can subtract it like this:

Lift the chin slightly, place (the tips of both thumbs together with Baubiat) on the concave ground on the side of the mandible, and press 10 second to relax. Repeat 3 times.

Raise your chin to the ceiling, close your mouth slightly, and protrude your chin as far as possible until you feel your neck stretched, lasting 10 second. Repeat 3 times.

Raise your chin to the ceiling, stretch and tighten your neck, and smooth your neck from clavicle to chin with your hands. Repeat 5 times.