 While in Germany he came under the influence of the teachings of Rudolf Eucken (1846–1926) and Henri Bergson (1859–1941).With Hans Driesch, who was formerly Eucken's student, Zhang travelled throughout China in the early 1920s, serving as Driesch's Chinese translator as he lectured on Eucken's philosophical vision.In 1922, Zhang led a committee which drafted an outline for a constitution with a federal system of government.