In this article the author considers that the northeast area is one of the cradles of Chinese civilizition. The ancient history of northeast China is periodized into five periods: period from the age of barbarism to beginning of civilization epoch;
The records made by the local elites with certain purpose and limitation together with the replacement of Linjun's narration by Xiangwang's narration reflected the cultural interaction vertically and horizontally in Tujia area in that period.
Famines in Shaanxi history is characteristic of frequentness, graveness, regionality and upgradation, assuming a recurrent period of proximately 3, 7, 15, and 22 years. Hence an obvious periodicity of 4 phases of high frequency.
The authors have investigated the current situation of local compile record of science and technology in China, and found some ubiquitous problems, such as unreasonable setting content, not canonical collecting items, too long publishing period and record's worse practicability.