Distinguished lecturer of China Enterprise Management Training Network, vice president of Tsinghua Old Science and Technology Workers Association (referred to as Tsinghua Old Association for Science and Technology), national famous Yijing master, Professor Tsinghua University, president of Tsinghua University President Student Club, and vice president of MIT Alumni Association Beijing Branch; He used to be the vice president of Tsinghua University Institute of Continuing Education, the director of Tsinghua University Foreign Academic and Cultural Exchange Center, and the director of Tsinghua University Foreign Affairs Office. Visiting scholar of Massachusetts Institute of Technology (1978 ~ 1980), visiting scholar of University of California, Berkeley (1986 ~ 1987), visiting scholar of Hong Kong University (1997 ~1997).