Gao Siwen, a craftsman in Qingdao, works in Aucma Co., Ltd., responsible for routine spot inspection, maintenance and repair of tools, and review of new product tool scheme. He has 28 years of mold related work experience, and has developed excellent maintenance technology through continuous learning and innovation. He paid attention to talent cultivation and successfully cultivated a new era of injection mold maintenance talent team. He led the preparation of operation and training manuals, innovated mold management, and improved production efficiency by 15.2%. He also often improves the new mold scheme, improves the mold life, reduces the number of paid maintenance molds to zero, and saves about 500000 yuan in annual maintenance costs@ Qingdao Federation of Trade Unions