Wang Hainan has been engaged in this field for many years and has experience. Liposuction is to use a negative pressure vacuum suction device (0.5- 1.0 atmospheric pressure) to connect with a metal suction tube with suction holes at the end, enter the subcutaneous through a small incision in the skin, and suck out part of the accumulated adipose tissue. In addition, the fat can be crushed by physical means such as ultrasound and high-frequency electric field, and then the liposuction tube is inserted into the subcutaneous fat layer through a small incision in the skin, and the human body is sucked out by the suction of negative pressure.