Unity and Management of the Qing Dynasty to Khorchin Mongolia before the Manchu Troops Entering into Shanhaiguan

Khorchin Mongolian is a Mongolian nomad with a long history in the west of northeast region.After the Manchu rising,from the post-Jin regime to the establishment of Qing Dynasty,Nuerhachi,Taizu emperor of Qing Dynasty,and Huang Taiji,Taizong emperor of Qing Dynasty extremely attached importance to the nomadic Khorchin Mongolian living in the western regions of Heilongjiang province.In order to get the powerful Mongolian tribes,Nuerhachi and Huang Taiji made the tribes surrender from hostile,finally yield thoroughly,by taking measures such as alliance,ex-marriage,rewarding knighthoods,legislative constraints and assigning lands and flags.Before entering into Shanhaiguan,the authority of Qing Dynasty had basically completed the unity and the management of Mongolian.post-Jin-Qing's regime and management of the unified Khorchin Mongolian provided the conditions for the Qing Dynasty and laid the foundation for entering the Central Plains.