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We report the self-diffusion and interdiffusion measurements in Ce-based glass forming melts.As a comparably new system in the family of bulk metallic glasses(BMGs),cerium based BMGs have attracted interests due to their novel properties like low glass transition temperature(Tg),strong liquid behavior and abnormal response to pressure.Due to its low-Tg properties,Ce-based BMGs have also been regarded as metallic plastic materials with extremely good deforming ability(GFA)near room temperature.The self-diffusion data were obtained through quasielastic neutron scattering(QNS).The interdiffusion experiments were carried out by a new sliding cell diffusion device built for liquid diffusion measurements in our lab.Compared with traditional long capillary diffusion instruments,the present sliding cell apparatus has an improved design.Composition effect and relation between self-diffusion and interdiffusion in the present Ce-based liquid alloys suggest that atomic diffusion and its microscopic dynamics are complicated than expected in conventional liquid metals,which are also different with those observed in Pd-and Zr-based BMG melts.