There is no certain regularity in using autologous tissue as surgical transplant material. Although it is "robbing Peter to pay Paul", it is a last resort under the condition that the existing artificial materials are not effective. The basic principle of taking autologous materials such as cartilage or dermis is 1, which must be taken. 2. The patient agrees. 3. Take as little as possible under sufficient premise to avoid waste. The wound should be as small as possible and as hidden as possible. We often take out 3-4 costal cartilages from the same incision and use them for sculptured stent rhinoplasty. Generally take 1 costal cartilage. When the demand is large, the effect of two costal cartilage on human body is limited. Cartilage removal has little harm to human body, and has little effect on normal work and life after recovery. This is also one of the reasons why autologous cartilage has gradually become a common material for cosmetic surgery at home and abroad when many materials are not ideal.