The author points out that, after the Li Fan Yuan (Council for Tribal Affairs) was changed into Li Fan Bu (Ministry of Tribal Affaires), the organ strengthened its relations with the central organs, took various investigations and carried out new policies in Mongolia, and played an important role in maintaining the relationship between the Mongol nobility and the central government.

Modern time ago, there were no so-called foreign affairs, only "Li-fan" in China, for a long time China had been confined to the traditional "Li-fan" system, and the feudal rulers stuck to the position of masters and to the diplomatic theory of ruling and appeasing other countries.

In the period of Ming dynasty the imperial military governors colleted and held lots of books, among which many are excellent editions.