Professor Yang Chengzong is one of the founders of radiochemistry in China. In 1947-1951, he was granted a scholarship for graduate study in the Institute Curie of Paris University in France. Upon receiving his Ph.D., he came back from France at once without hesitation. Early in the 1950s, Professor Yang was the pioneer in developing fundamental radiochemistry and its application. Professor Yang’s most outstanding contribution to the development of China’s nuclear energy is in the field of nuclear fuel production, which plays an important role in nuclear weapons tests. Professor Yang is a rigorous and hard-working scientist holding fruitful achievements with noble character and high prestige. This brief biography not only acts as a historical record of his career of scientific research and teaching , but also serves as enlightenment to us.