collaborated with a stationery brand to customize precision hardware clips for bookmarks. Using high-strength zinc alloy material, through precision die-casting and grinding processes, the clip is small in size and light in weight, which can be easily clipped between book pages without damaging the paper and occupying too much space. The surface can be customized with gold plating, silver plating, spraying and other processes, with various colors, and can be matched with personalized patterns, fitting the stationery aesthetics. The elasticity is moderate, the paper is firmly clamped without loosening, and it is not easy to deform or break after repeated use. This customized clip helped the partner improve the differentiation of bookmark products, with sales increasing by 47%, becoming the preferred bookmark supporting product for students and office workers.