Abstract:

After the September 18^th Incident, Japan launched an all-out invasion of Northeast China. In order to maintain the national sovereignty and territorial integrity, Chinese scholars represented by Fu Sinian hoped that academic research was able to provide strong evidence in the investigation of the League of Nations. Later, the scholars of “Yu Gong” also gradually began to adapt to the times, shifting their research from geographical change to the historical and geographical studies of the frontiers. After the outbreak of Anti-Japanese War, Jin Yufu wrote his influential General History of Northeast China, which further confirmed that Northeast China was the inherent territory of China and completed the “academic border defense”. In this period, there emerged a large number of research findings on the Northeast made by China’s patriotic scholars.

Key words: academic border defense, history of Northeast China, Outline of the History of Northeast China, Yu Gong Semi-Monthly, General History of Northeast China