Today, 109 years ago, on March 7, 1916 (February 4, 1916), the Chinese Academy of Sciences academy academician, atomic medicine scientist Wang Xian was born. Wang Xian, March 16, 1916 ~. 1938 graduated from Qinghai University. In 1948 and 1949 he received a master's degree and a doctoral degree respectively at Iowa University in the United States. A member of the Faculty of Biology of the Chinese Academy of Sciences. Professor at the Chinese Association of Medical Sciences University, honorary director of the Institute of Radiological Medicine of the Chinese Academy of Medical Sciences. In China, the synthesis of isotopic markers, fluid flash meters, release analysis, medical activation analysis, stabilization of nuclear medicine applications, release of imaging and other technologies were created; systematically conducted thyroid hormone tracking research, and the positive