As the pace of the electronic information age accelerates, people are increasingly demanding mobile phones. High-end brands such as Apple, Samsung, and Huawei not only have a strict grasp of their internal quality, but also have a high demand for customer experience and appearance. The era of plastic mobile phone cases has passed. Mobile phones with metal cases have become the market leader. Not only has its quality improved, but its aesthetics has also greatly increased the sales value of mobile phones.