What strategic experience have you accumulated in the practice of border management in past dynasties?

First, from the strategic height of "strengthening the border defense", we should pay attention to the implementation of "immigration to strengthen the border". The activity of "moving people to the real world" appeared as early as the Warring States and Qin Dynasties. For example, after Qin Shihuang unified China, in order to consolidate the security of the northern border areas, a large-scale "moving people to the real border" campaign was launched. However, the defense of the Huns in the Qin Dynasty mainly relied on military means, and there was no systematic and feasible plan for the work of "emigrating to the border", let alone Jackie Chan's supporting policies, or even forced immigration. Therefore, the Qin Dynasty's "moving people to the border" was only an expedient measure to defend against the harassment of nomadic people, not a strategic measure to stabilize the border. The Han Dynasty summed up the experience of the Warring States and the Qin Dynasty in dealing with the Huns' attack, changed the simple military defense mode in the past, and, starting from the strategy of consolidating the border, incorporated "immigrants' solid border" into the big system of border management as a long-term solution to stabilize the border. This new strategic move organically combines the construction and defense of the frontier, which not only fundamentally changed the situation of the frontier, but also played an important role in the frontier construction of later generations. Since then, the unified dynasties have basically been able to implement the strategy of "emigrating to the real border" as "strengthening the border and securing the defense".

Second, the government should balance the overall situation and proceed from the needs of the national security strategy and implement it in a balanced manner. In the history of China, the frontier is vast, and there is a huge contrast between the frontier and the mainland in natural conditions and the level of economic and cultural development. The situation in each border area is very complicated, with different natural conditions and different economic forms. In particular, the main threats faced by China's ancient frontiers were mostly concentrated in the north and northwest. Therefore, whether the northern and northwestern frontiers can be effectively managed under the premise of ensuring the stability and development of the imperial center hinterland is related to the security and stability of the whole country and the success or failure of the great unification cause. Only by planning from the height of the overall national security strategy can the work of "migrating to the real border" achieve the expected results. For this reason, successive dynasties regarded the management of the northern and northwestern frontiers as the top priority of frontier management, planned the work of "emigrating to the real frontier" from a strategic height, and regarded the northwestern and northern frontier areas as the main direction of immigration, which not only consolidated the achievements of military victory, but also made some areas in the northwestern and northern frontier areas become strategic bases for border construction and management, which fundamentally changed the security situation in the frontier areas.

Third, respect economic laws and formulate various supporting measures to ensure the actual effect of immigration to the frontier. This is manifested in:

Successive dynasties often chose the location of immigrants in key frontier areas with superior agricultural production conditions to ensure that immigrants settled in the frontier for a long time.