Hyaluronic acid is a straight-chain polymeric polysaccharide composed of disaccharide units (glucuronic acid -N- ethylthioglucosamine), which is a naturally occurring substance in tissues. In nature, it is widely found in the connective tissues of vertebrates, mucus tissues, the lens of the eye, and the intercalated membrane of certain bacteria. In addition to its effectiveness in wrinkle removal, it can also be used for lip augmentation and rhinoplasty. At present, the qualified hyaluronic acid products that have been approved by the State Food and Drug Administration (SFDA) are: “Yimei” and “Ruilan 2”. It is safe to inject these products in regular medical beauty institutions, and they are maintained in the body for half a year.