collaborated with a high-end fountain pen brand to customize 18K gold nib iridium particles. Using high-hardness wear-resistant alloy, through laser spot welding and manual grinding technology, the smoothness of the nib is increased by 35%. At the same time, the structure of the iridium particle diversion groove is optimized to make the ink flow out evenly and stably, eliminating the problem of ink breakage and blank spots. After the fountain pen equipped with this nib was launched, it helped the partner increase the sales of high-end fountain pens by 68%, becoming a popular choice for business people to collect and give as gifts.