What are the complex relationships presented between the traditional concepts of border governance as well as border policies and the historical evolution of the border?

On the one hand, Chinese culture's attitude toward the outside world and its way of dealing with border issues have influenced the formulation of border strategies and the practice of border management. Although the policies of border control in the past generations were not identical, and the understanding of the significance of border management and national unity and development had gone through a long process of evolution in terms of understanding and corresponding initiatives, the deeper cultural origins behind them were the same. On the other hand, the practice of border management in realpolitik, in turn, prompted people to think more systematically and rationally about the border issue. As a result, the worldview of "one world", the ethnic view of "the distinction between Yi and Xia", the principle of "the way of the king" in political philosophy, and the theory of "economic power", as a kind of ideology, have become more and more important to the people. As an ideology and value system, the theory of "the king's way" and the theory of "the power of the emperor" ****together constitute the conceptual system of China's traditional border philosophy, which has become the ideological basis for successive generations of border ****together, and on this basis, two mutually complementary concepts of "the king has no foreigners" and "the defense of the barbarians and the summer" have been formed. "On this basis, two complementary strategies of border rule have been formed. Until modern times, this concept of border control still maintains a strong continuity.