If you must cut off a part of the relatively perfect human body formed after a long evolution, that's fine.
It's okay to cut your stomach. Cutting off half can reduce food intake and achieve the effect of slimming. Many female stars do this, but this thinness is due to poor absorption, and nutrition will be absorbed much less. For example, it is enough for normal people to eat six carrots, and you have to eat 12 carrots to absorb the same nutrition as normal people. This is not worth the loss.
The other is to cut ribs. I still don't agree with this bone cutting. If those two bones can't grow, why do you want them? Bone cutting is not recommended.
Don't ruin your precious body in order to lose weight. Health is the most important thing. Everyone wants to pursue beauty, but why give up health? You can choose healthy ways to lose weight, such as reasonable exercise, sit-ups, waist and abdomen exercises, etc. If you don't want to move, you can be hungry if you eat less, but don't go on a diet! ! Eat less today, eat less every day, and you can lose weight.