 In 1955, he accused architect Liang Sicheng of committing the mistake of "Bourgeois idealism" and argued in favor of destroying the Beijing city wall.In 1956, He started working at the atomic energy division of the Science Institute of China, and in 1958, he went to the Joint Institute for Nuclear Research in the USSR.In 1960, he returned to China to join the development of China's hydrogen bomb.