Audrey's principle is to break down fat. Breaking down stubborn fat into free fat is excreted through sweat and urine. The fat discharged is not the fat produced when we massage. Fat burning will release heat, make the body sweat and speed up metabolism. As an additional function, fever will help accelerate the metabolism of fat. Wrapping plastic wrap is to better absorb the product. If the products without plastic wrap are in direct contact with air, some of them will be volatilized and oxidized, and the oxidation speed is greater than the absorption speed, and the effect will be much worse.