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In the study of Chinese history, Liji proposed early on that the method he called" psychology+bilingual study system+anthropology" should be adopted, and there are no more than two types of people who can effectively use this research method: one is foreign scholars who"earn to think in Chinese and Chinese characters, must be able to objectively reflect on their own thinking process in another language that he is equally familiar with", Another type is Chinese scholars who are 'native speakers of Chinese languag..and have received comprehensive scientific training,and are also proficient in foreign language'.