失焦——历史分期论争与中文世界的士族研究    仇鹿鸣

士族研究一直被视为中古史领域中的基本问题。回溯学术史，中文世界的士族研究与历史分期论争关系是离散的，目前士族研究是以政治史为取向，这一传统大约自1980年代以来经过三种因素的合力而形成。在近百年的学术史上，士族研究受各种学术潮流及时势变迁的影响，在大陆与港台呈现出不同的面貌，但“理论缺位”是其共同的弊病。在大量具体研究累积的基础上，重归长时段的思考，仍有其意义。对唐代士族及社会构造演变的重新思考有望成为新的突破口。

Unfocused: The Debate on the Division of History and the Study of the Aristocrat in Chinese Academia    Qiu Luming

The study of the aristocrat has always been regarded as a basic problem in the field of medieval Chinese history. By reviewing the academic history, the relationship between the study of aristocrat in the Chinese academia and the debate on the division of history is discrete. At present, the study of the aristocrat is closely related to the political history, this tradition has been formed by the combination of three factors since the 1980s. In the academic history of the past hundred years, the studies have been influenced by various academic trends and changes in the times, and they have shown different faces in mainland and Hong Kong and Taiwan. The lack of theory is their common weakness. On the basis of a large amount of concrete research, now it is still meaningful to think for a long time. It is expected to be a new breakthrough to rethink the evolution of the Tang Dynasty's aristocrat and social structure.