1953- 1956, chief designer of the second design branch of the First Ministry of Machinery Industry.
1956- 1960, Institute of Physics, Chinese Academy of Sciences, associate researcher.
1960-, Director of Institute of Semiconductors, Chinese Academy of Sciences; Director; researcher
Academic or professional organizations:
1985-, Vice Chairman of Beijing Branch of Multinational Institute of Electrical and Electronics Engineers.
1988-, vice chairman of China Institute of Electronics.
1994-, editor-in-chief of editorial board of Journal of Electronic Science.