Today, 56 years ago, on February 18, 1969 (January 2, 1969), Chinese mining geologist Meng Chung-jin died. Meng Chung-jin (1900¨C1969), Zhang Yuan, Jiang Zhou entered the United States in the early years of studying in the United States, in 1927 he received a master's degree from the Massachusetts Institute of Technology. After returning to China, he worked as a researcher at the Central Institute of Geological Studies, professor at the University of Qinghai, deputy director of the Department of Geological Mines, deputy dean of the Chinese Academy of Geological Sciences, member of the Faculty of Sciences of the Chinese Academy of Sciences, editor-in-chief of Geological Review, the Geological Sciences Journal, and others. He was a pioneer in the research into the classification and role of mines in mines