In the student days.

Yu, whose real name is Duanfu, was born in a poor family in Hexian County, Anhui Province. It was 19 1 1 year. He graduated from primary school and was admitted to middle school. Graduated from high school and admitted to Tianjin Beiyang University. Two years later, he transferred to the Geology Department of Peking University, and was selected by the school for a short visit because of his excellent academic performance. The research work has just begun, but it was interrupted by the "Cultural Revolution". During this period, although he was persecuted and sent to the countryside, he still did not forget this research work. When he came back from the countryside, he was over 70 years old, but he immediately asked the school to restore the research requirements of this subject and insist on realizing his long-cherished wish-to contribute to the development of the frontier. After three years of hard work, he and his assistants made a detailed division and comparison of the Lower Carboniferous in eastern Xinjiang, China, made clear the characteristics of coral groups, and found a large number of different corals, which filled the research gap of this category for China.

I have studied corals for more than 50 years and accumulated rich data. As early as 1960s, he wanted to summarize some problems in coral research for future generations. But this idea was not realized until 1978. With illness and crutches, he devoted himself to writing a monograph on Carboniferous and Permian corals. Actively participate in comprehensive regional geological research and make outstanding achievements.

In the early days of the People's Republic of China, he participated in and was responsible for mineral survey in Xiaoxing 'anling, Mishan and Fushun in Heilongjiang during the period of1951. At that time, the traffic conditions in Northeast China were extremely poor, the land was vast and sparsely populated, and it was a forest and swamp area, so the field work was extremely difficult. At this time, Yu Lao is over half a year old, riding through the forest swamp every day, and never taking a rest even on rainy days. In summer, regardless of the hot weather and mosquito bites, I put on a veiled hat, looked for rock outcrops everywhere, and collected and studied rocks and fossils. 1952 also participated in the Sino-Soviet cooperation in the survey of mineral resources in Daxinganling and Heilongjiang basins, and was the head and technical consultant of Yu Lao Ren Zhongfang. After several years of on-the-spot investigation, he not only got a better understanding of mineral resources in Northeast China, but also found that Nenjiang shale produced in Daqing Oilfield today contains oil shale. At the same time, he also inspected Ganhe Coal Mine in Heilongjiang Province and Xiaoxing 'anling placer gold mine in northern Heilongjiang Province. In stratigraphic research, according to fossils, the existence of marine Devonian, Carboniferous and Permian in Xiaoxing 'anling area is confirmed. The marine Permian limestone near Acheng, east of Harbin, Silurian in Erdaogou, Jilin, Carboniferous and Silurian in Panshi and Mingcheng, Jilin, and tertiary coal-bearing strata in Fushun, Liaoning are studied in detail. At the same time, it also pays attention to the study of Quaternary glacier geology on the eastern slope of Daxinganling, and makes a detailed investigation on the engineering geology of Kumotong Dam in Nenjiang, Heilongjiang Province, the water conservancy irrigation project of Chahayang Farm in Heilongjiang Province, and the study of modern volcanic activity in Xiaoxing 'anling. 1958, I personally went to the south of Liaodong Peninsula to study the Late Proterozoic strata, and published the monograph Sinian Strata in the South of Liaodong Peninsula and the article Geological Structure from the Western Slope of Daxinganling to the Upper Reaches of Heihe River 1959 to 1960.

The comprehensive geological research in Northeast China for several years has laid the geological foundation in Northeast China and made important contributions to the large-scale economic construction in Northeast China. Founder of Nautilus Fossil Research in China

Yu is not only an expert on coral fossils in China, but also the founder of Nautilus fossil research. As early as 1928, when I made a geological and mineral survey in northwest Hubei, I studied not only the geological and mineral resources in this area, but also the Ordovician nautilus fossils in this area. /kloc-published the first monograph "Ordovician Cephalopod Fossils in Central China" in 0/930. This paper describes the classification, stratigraphy and geographical distribution of Ordovician nautilus fossils in the Yangtze platform area, and discusses in detail the characteristics and biogeographic areas of this kind of fauna. This is the first monograph by paleontologists in China on the Ordovician orthogonal fauna in southwest China. At the same time, the book points out the remarkable differences between the Ordovician bamboo reef fauna in North China of China and the Ordovician trapezium fauna in Southwest China, which lays a solid foundation for the future study of Ordovician nautilus fossils in China. It has played an important role in promoting the development of Ordovician biostratigraphy and paleogeography in China. The publication of this monograph has aroused widespread concern and attention of international paleontologists, and caused a long-term discussion that "Qinling-Seoul Line" is the dividing line between tectonics and paleontology in East Asia. Later, in the early 1950s, Yu also studied the Ordovician nautilus, gastropods and trilobites in China, Hubei and Guizhou. According to a small number of pearl horn fossils found in southwest China, it is considered that the Huaiyang Mountains in Qinling Mountains have not completely blocked the local communication between North China and Ordovician waters in southwest China. In this paper, not only the Ordovician nautilus fossils in China were deeply studied, but also the Permian sponge fossils, Jurassic ammonites and Ordovician gastropods in China were studied. He has been engaged in geological education for a long time and has trained many geologists for the country.

Yu's life activities are closely related to his dedication to China's geological education. A large number of geological and paleontological talents have been trained all over the country. After graduating from university, he worked as a teacher until he entered the Institute of Geology of Academia Sinica, where he also worked as a university teacher. Since People's Republic of China (PRC) was founded 30 years ago, the people of China have been devoted to education. After returning from studying in Britain, he worked as an adjunct professor at Nanjing Central University, and later the Institute of Geology moved to Chongqing, where he also worked as a professor at Chongqing Central University and Chongqing University. In teaching, he showed superb teaching ability, incisive content, concise language and clear organization, which won the praise of students.

In the winter of 195 1, the country urgently needs to train a large number of geological talents to adapt to the upcoming large-scale economic construction. On the recommendation of teacher Li Siguang, Yu and He came to Changchun to set up the Institute of Geology. Although he lived in Nanjing for a long time and had several jobs, considering that education is a great undertaking of the country, he accepted the task and his family came to Changchun, which was already in the cold winter.

After coming to Changchun, he first served as professor and head of geology department of Changchun Institute of Geology, and 1952 established Northeast Institute of Geology as professor and head of geological exploration department. As one of the teaching organizers and leaders, he worked with school leaders to build a team of teachers, teaching materials and teaching equipment. He spared no effort to create conditions for teachers' further study and improvement, and personally participated in the compilation of teaching materials. In addition to teaching, he often goes to the laboratory to learn about the experimental contents, effects and experimental specimens. He conscientiously implemented the policy of combining teaching, scientific research and production practice, and many scientific research achievements were completed by combining teaching and production tasks. During his tenure as the director and vice president of the scientific research department of the college, he always worked as a teacher in the front line of teaching. From 65438 to 0957, he began to recruit graduate students, and then increased the number of students every year. At the same time, as long as the teaching task requires, he never refuses. In teaching, he is strict, first of all, he pays attention to the cultivation of students' style of study, and often says to students: "Keep studying and study hard; We must have the courage to get to the bottom of it. "In order to teach new lessons, I took out hundreds of specimens and some precious materials that I have accumulated for more than 30 years for students to use. Although he is a famous stratigraphic paleontologist in China, a member of the department and has many years of teaching experience, he never prepares lessons hastily but deliberately strives for perfection. He pays attention to starting from the students' actual knowledge level and making the theoretical concepts clear and thorough. In order to ensure the teaching quality of the experimental class, we should review the experimental contents in person and guide the students to do the experiment in person. He instructed graduate students to be meticulous, revise their papers word for word, and even consider the use of punctuation marks.