Needle-free fat-dissolving thread is a needle-free material that uses the physical action of air pressure to press the needle tip of microneedle into the inner layer of skin at high speed without using traditional microneedles. This substance stimulates the regeneration of skin collagen and achieves the effects of firming, lifting and wrinkle removal. There are 7 kinds of needle-free fat-dissolving lines, the length of which is between 4- 10 mm, and the effect lasts about 3-5 years.