 He was a leading light in the world peace movement in Burma, and in 1952 attended the Peace Conference for Asia Pacific Region in Peking.He was elected Chairman of the World Peace Congress (Burma) the same year, and won the Stalin Peace Prize in 1954.Hmaing also travelled to People's Republic of China, Mongolia, Hungary and the Soviet Union in 1953, and went to Ceylon and India for the World Peace Conference in 1957.