Abstract: The French physicist Paul Langevin, as an expert of the League of Nations' Commission for Survey, visited China from 1931 to 1932. According to the Chinese newspapers and periodicals of the time, and the archives in the Centre de Ressources Historiques, Ecole Supérieure de Physique et de Chimie Industrielles, his scientific activities in China reveal the state of scientific exchanges there during the early 1930s. His suggestion for establishing a Chinese Physics Association is of high historical importance.