《旧唐书·经籍志》是我们考察唐代开元时期图书流传最基本的书目文献。过去,学者们对《旧唐志》关注较少,近年来研究论文渐多,其中牛继清先生的论文特别引起了我的注意。牛先生对《旧唐志》的研究主要做了两个方面的工作:一是对今本《旧唐志》 “Old Tang · Ji Zhi Zhi” is the most basic bibliography of our study on the circulation of books in the Kaiyuan period of the Tang Dynasty. In the past, scholars paid little attention to “Old Tangzhi”, and more and more research papers have been published in recent years. Among them, Mr. Niu Jiqing’s essay caught my attention. Mr. Niu’s work on the “Old Tang Chi” has mainly done two aspects of work: First, the current “Old Tang Chi”