Li Chuncai, an expert from Li Zhen International Body Sculpture Center, pointed out that risorius is a laughing muscle. When he is full, he always looks sweet and friendly when he smiles. With the loss of facial nutrients, it was not replenished in time, which led to risorius' depression and no sweet feeling when he smiled. So it can be filled with autologous fat. In the process of liposuction, the extracted fat contains a lot of collagen and elastin, and the fat with high survival rate screened by it is injected into risorius to make it full and look delicate and lovely when you smile. Therefore, it is effective to enrich risorius with autologous fat. Considering the long-term safety, autologous fat as filler will not cause allergic reaction, which is why autologous fat is so popular in risorius.