At present, there are only two kinds of legal botulinum toxin in China, which are imported from the U.S. and Henley, both of which are type A botulinum toxin, the main differences are as follows: 1. The molecular weight of the botulinum toxin is larger than the molecular weight of the botulinum toxin, so the concentration of the botulinum toxin is slightly higher per unit dose; 2, the dispersion is different. Domestic facial slimming needle diffusion range is relatively large, about 1.5cm, so the injection distance to the safe range than the imported botulinum toxin to be wider, generally more than 1.5cm, while the imported botulinum toxin diffusion is more accurate, is 1cm, so relatively safe; 3, BOTOX is vacuum-drying method, not easy to produce antibodies. And Hengli uses the lyophilization drying method, which is easy to produce toxoid, and toxoid produces antibodies but not the effect. From the point of view of efficacy, because both are the same type A botulinum toxin, its principle is the same, the efficacy is basically the same.