Core Viewpoint - The article highlights the journey and achievements of Xu Chengdong, a skilled worker at Yunnan Chihong Zinc & Germanium Co., Ltd., who has significantly contributed to the advancement of lead smelting technology in China through innovation and dedication [1][2][3]. Group 1: Background and Early Career - Xu Chengdong, originally from Huize County, Qujing City, Yunnan Province, was inspired by the local lead-zinc mining industry and pursued a career in smelting after completing middle school [2]. - He started working at Huize Lead-Zinc Mine in 1991, initially in a mechanical repair workshop, but quickly moved to the sintering workshop to learn smelting technology [2]. Group 2: Technological Advancements - In 2004, the company invested heavily in introducing the IsaSmelt furnace from Australia to enhance smelting processes, with Xu being one of the selected workers for training [3]. - Xu overcame language barriers and mastered the IsaSmelt technology within three months, becoming the first operator in China to use this technology for lead smelting [3][4]. - He proposed a solution to a critical issue of molten pool freezing during production, which was recognized by foreign experts [4]. Group 3: Continuous Improvement and Innovation - Xu led multiple technological improvements in the IsaSmelt process, achieving record production levels and significantly extending the lifespan of equipment [5]. - His innovations included enhancing the design of the spray gun and increasing the oxygen concentration in the IsaSmelt furnace, which improved smelting efficiency and reduced costs [5][6]. - Xu's team achieved a historical record of 85,000 tons of crude lead production in 2014 and set a record for the lifespan of furnace bricks at 978 days from 2013 to 2015 [5]. Group 4: Mentorship and Legacy - Xu has been recognized with numerous awards, including national labor model and technical expert honors, and he remains committed to mentoring the next generation of smelting professionals [7]. - He established the "Xu Chengdong Labor Model Innovation Studio" to promote technical skills and innovation within the industry [7][8]. - Xu's mentorship has led to the development of skilled technicians who have become key contributors across various subsidiaries of the company [8].