Our research, based on a comparison between People´s Daily and The New York Times of Tibet-related reports, sets out to analyze their difference in source choicesand tries to answer a series of questions concerned: whether such a difference will influence their positions and attitudes in reports; what different communication effects will be therefore produced (whose voices are successfully made heard; which voices in public are affected positively or negatively). The paper has confirmed a basic hypothesis: both of the two newspapers have obviously their own path dependence on source choices, which apparently exerts a potential influence on their attitudes in Tibet-related reports. Such a conclusion provides thus a new and operative approach to enhance the communication with western media as well as societies and to ameliorate Chinese media reports in external dissemination of Tibet issue.