Yang Chengzong(Yang Jeng-tsong), founder of radiochemistry in New China, was born 1911 at Wujiang county, Jiangsu Province. He commenced his study of radiochemistry 1934 in the Institute of Physics-Radium of National Academy of Peking. Yang worked in the Curie Laboratory of University of Paris since early 1947 under the direction of Madame Irene Joliot-Curie, and succeeded in the study of separation of trace amounts of radioelements from weighable quantities of carrier substance. He was awarded the Doctor Degree in 1951.
When Yang was preparing his way home, Professor Frederic Joliot-Curie, the President of World Council for Peace, asked Yang deliver his confidential message to President Mao Tse-tong: “......you must guard the peace and oppose the atomic bomb, you must have the atomic bomb yourself......".Yang returned to his motherland in fall 1951. It is reported the message had helped the ultimate decision by Chinese authorities to develop the atomic weapon.
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