Liposuction: excess fat is sucked out by negative pressure. The key surgical instruments are very similar to enlarged needles. Needles stuck in the skin have eyes the size of mung beans, and most of the subcutaneous fat in the second and third layers is evenly sucked out. Expansive perfusion technique is used in the operation, so that a certain amount of fat must be sucked out and it will not cause other negative effects on the body. After the operation, the bean-like "eye of a needle" was carefully stitched, and almost no traces of the operation could be seen. The skin of the operation site is soft, smooth and scar-free, and the operation effect is satisfactory.