In the first section , the historical background of huai - si area before the establishing of tang dynasty was briefly related . in the second section , the author put his emphasis on the discussion of various natural conditions and their influence on this area in this period , such as physiographical and features , hydrological conditions , climate , soil and vegetation 重点探讨唐代淮泗地区经济发展的自然条件和社会条件，特别是对唐代淮泗地区的自然地理条件，从地文、地貌、水文、气候、土壤和植被诸方面对经济开发的影响作了较为详尽的探讨。
