He held the post of professor of law until 1691.

He held the post of professor of theology there from 1965 until 1979.

In 1937 the post of assistant professor in the faculty.

In 1946, he transferred to Peking University for the post of professor.

In 1954,he accepted the post of professor at Toyo University.

Only three of the 87 academics promoted to the posts of professor or reader since 1990 have been women.

On July 1, 1989 he returned to the post of Professor on a full-time basis.

Soon after, he assumed the post of professor at the university's then newly established College of Science.

In 1981 he took up the post of clinical professor of family medicine at Indiana University.

He currently holds the post of professor in the University of Durham.