Core Viewpoint - The article highlights the achievements and dedication of Zheng Sanjun, a senior engineer at the Gansu Provincial Surveying and Mapping Engineering Institute, who has been recognized as a national advanced worker for his contributions to surveying and mapping in challenging environments [2][19]. Group 1: Professional Achievements - Zheng Sanjun has transformed from a surveying apprentice to an industry benchmark through persistent effort and dedication, often carrying heavy surveying equipment to high-altitude observation points [4][19]. - He has led significant projects, including the first national geographic condition survey in Gansu, completing tasks ahead of schedule despite harsh conditions [7][17]. - His work has resulted in over 3,000 surveying markers being surveyed and maintained, emphasizing the importance of these markers in safeguarding national geographic information [4][16]. Group 2: Technical Contributions - Zheng has been instrumental in adopting advanced surveying techniques, such as large-scale sparse control point satellite imagery, which requires high precision in field control points [4][19]. - He has contributed to the first natural resource registration in the Gansu section of the Giant Panda National Park, expanding the spatial dimension of natural resource registration [8][17]. Group 3: Community Engagement - In 2017, Zheng was appointed as the team leader and first secretary of a poverty alleviation initiative in a remote village, successfully reducing the number of impoverished households from 114 to 8 over two years [10][17]. - His efforts in community engagement included personalized assistance measures and fostering relationships with villagers, leading to significant improvements in the village's socio-economic conditions [10][17]. Group 4: Recognition and Legacy - Zheng has received multiple accolades, including "Gansu Provincial Technical Model," "Gansu Provincial Excellent Communist Party Member," and "Gansu Provincial May Day Labor Medal," reflecting his commitment to his profession [17][19]. - His philosophy of using professional skills to protect the environment and pass on craftsmanship is a testament to his dedication to the surveying profession [8][17].