There are many problems with the chicken-eating artifact in the shape of the last fighter, especially the way of pressing the key, which often shoots automatically and does not feel good. With the experience of the last time, many conveniences have been improved this time, and the market feedback after listing is quite good. In fact, when I was doing the previous design, I drew a sketch of a helmet. At that time, I had some ideas, but there were no similar products in the market. Then the modeling is deliberated on the paper, and the thinking becomes clearer and clearer in the process of painting. I drew four schemes for customers to choose. I am more inclined to scheme 2, which has the element characteristics of the third-level head, but it is not particularly similar. I am inclined to science fiction style and have a strong sense of streamline. However, the customers chose scheme 1 and hope to be as similar as the third-level head as possible. After modeling, the difference from the sketch is relatively large. After the first wave of renderings is confirmed, the buckle is mainly modified. The thickness range of the buckle in this way is greatly increased, and the mobile phone and mobile phone case will not be scratched. The operation is also very simple. Then, at the request of the customer, a key chain is added, which can be used as a pendant and portable.