Among the central organizations, there is the establishment of the National Defense Academy; Among local organizations, there are generals, commanders and ministers who effectively manage border areas; In border ethnic areas, officials are appointed according to customs, forming a set of top-down, powerful and complete border ethnic management framework to govern border areas and implement border ethnic policies. The main frontier management in the early Qing Dynasty was Mongolia and Northeast China. Manchu and Mongolian marriage, the implementation of the three generals system, the capital system and the flag-and-people dual-track system in the northeast to prevent tsarist Russia. In the later period, it will manage Tibet, Xinjiang, Southwest China and coastal areas. Shun, Kang and Yong periods are the development stages. During Shunzhi, Kangxi and Yongzheng, the Qing government gradually evolved into a state power. With the further development of a unified multi-ethnic country, great changes have taken place in the frontier policy. Because the problem of quasi-yurts in northwest China has not been finally solved, its frontier policy is still in the process of further improvement. 1698, Kangxi leveled Grdan, which laid a good foundation for Qianlong to control the northwest and southwest borders. The mid-Qianlong period is a complete stage. In the mid-Qianlong period, the Qing army marched to the north and south of Tianshan Mountain, and successively settled the Zhungeer nationality and the anti-Qing forces, and Xinjiang was stable. With the final settlement of the northwest issue, the frontier policy of the Qing Dynasty became more and more complete, which was mainly reflected in the ruling policy towards Xinjiang and Tibet. However, in the late Qing Dynasty, the problem of political troops scattered in the frontier became serious, so I won't say much about it. Finally, I recommend two books to the landlord. These books are History of Local Administrative System in Qing Dynasty and Frontier Policy in Qing Dynasty.