Excellent product design should at least think about three points: design concept creativity, user experience, and corporate benefit thinking. Before upgrading, analyze and think according to the original design before the iteration, strengthen the concept of portability of the outer box, and focus on the analysis from the perspectives of cost, experience, and brand. As a result, after the iteration of the 2.0 version design, the mold cost is greatly reduced by 2/3, and the cost unit price is reduced by nearly 4/5, while greatly reducing costs, the user experience and portable security issues have been greatly improved.