Brief introduction of Zhang Yujin

Zhang Yujin, male, president and secretary of the Sino-Vietnamese Land Boundary Demarcation Branch of the First Institute of Surveying and Mapping Engineering in Sichuan Province, is a model worker in Sichuan Province. In order to participate in the surveying and mapping support of the national key project of South-to-North Water Transfer, he concealed the medical history of major liver resection, bid farewell to his wife who was pregnant soon, and went to work in a no-man's land with an average altitude of more than 4,000 meters. She suffered from severe pulmonary edema and coma due to fatigue and cold. She stopped breathing three times and got three needles in her arm, but she was pulled back from the dying line. Later, 70% of the stomach was removed because of bleeding from gastric perforation. I never consider personal gains and losses in my work. Facing the harsh conditions such as cliffs, mines, heavy rains, cold winds, poisonous snakes and grasshoppers on the Sino-Vietnamese border, I always rushed to the front line and successfully completed various surveying and mapping tasks.